diff --git a/example/pubspec.lock b/example/pubspec.lock
index adbeff69b9..cb22b1fa82 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -1,41 +1,34 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
-  archive:
-    dependency: transitive
-    description:
-      name: archive
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.13"
-  args:
-    dependency: transitive
-    description:
-      name: args
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.6.0"
   async:
     dependency: transitive
     description:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.4.1"
+    version: "2.5.0-nullsafety.1"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.0-nullsafety.1"
+  characters:
+    dependency: transitive
+    description:
+      name: characters
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0-nullsafety.3"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.3"
+    version: "1.2.0-nullsafety.1"
   chewie:
     dependency: transitive
     description:
@@ -50,13 +43,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.0+1"
+  clock:
+    dependency: transitive
+    description:
+      name: clock
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0-nullsafety.1"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.14.12"
+    version: "1.15.0-nullsafety.3"
   convert:
     dependency: transitive
     description:
@@ -64,13 +64,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.1"
-  crypto:
-    dependency: transitive
-    description:
-      name: crypto
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.4"
   css_colors:
     dependency: transitive
     description:
@@ -84,14 +77,21 @@ packages:
       name: csslib
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.16.1"
+    version: "0.16.2"
   cupertino_icons:
     dependency: "direct main"
     description:
       name: cupertino_icons
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.2"
+    version: "0.1.3"
+  fake_async:
+    dependency: transitive
+    description:
+      name: fake_async
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0-nullsafety.1"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -110,7 +110,7 @@ packages:
       name: flutter_svg
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.17.4"
+    version: "0.19.1"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -127,28 +127,21 @@ packages:
       name: html
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.14.0+3"
-  image:
-    dependency: transitive
-    description:
-      name: image
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.12"
+    version: "0.14.0+4"
   matcher:
     dependency: transitive
     description:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.6"
+    version: "0.12.10-nullsafety.1"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.8"
+    version: "1.3.0-nullsafety.3"
   open_iconic_flutter:
     dependency: transitive
     description:
@@ -162,14 +155,14 @@ packages:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.4"
+    version: "1.8.0-nullsafety.1"
   path_drawing:
     dependency: transitive
     description:
       name: path_drawing
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.1"
+    version: "0.4.1+1"
   path_parsing:
     dependency: transitive
     description:
@@ -183,14 +176,7 @@ packages:
       name: petitparser
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.4.0"
-  quiver:
-    dependency: transitive
-    description:
-      name: quiver
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.3"
+    version: "3.0.4"
   screen:
     dependency: transitive
     description:
@@ -209,98 +195,98 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.8.0-nullsafety.2"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.9.3"
+    version: "1.10.0-nullsafety.1"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.0-nullsafety.1"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.5"
+    version: "1.1.0-nullsafety.1"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0-nullsafety.1"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.15"
+    version: "0.2.19-nullsafety.2"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.6"
+    version: "1.3.0-nullsafety.3"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.8"
+    version: "2.1.0-nullsafety.3"
   video_player:
     dependency: transitive
     description:
       name: video_player
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.10.10"
+    version: "0.10.12+5"
   video_player_platform_interface:
     dependency: transitive
     description:
       name: video_player_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.2"
+    version: "2.2.0"
   video_player_web:
     dependency: transitive
     description:
       name: video_player_web
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.3"
+    version: "0.1.4+1"
   wakelock:
     dependency: transitive
     description:
       name: wakelock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.4+1"
+    version: "0.1.4+2"
   webview_flutter:
     dependency: transitive
     description:
       name: webview_flutter
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.21"
+    version: "0.3.24"
   xml:
     dependency: transitive
     description:
       name: xml
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.6.1"
+    version: "4.2.0"
 sdks:
-  dart: ">=2.7.0 <3.0.0"
-  flutter: ">=1.17.0 <2.0.0"
+  dart: ">=2.10.0-110 <2.11.0"
+  flutter: ">=1.18.0-6.0.pre <2.0.0"
diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index 1d2f936f70..22a3290c39 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -1,5 +1,6 @@
 name: example
 description: A new Flutter project.
+publish_to: none
 
 # The following defines the version and build number for your application.
 # A version number is three numbers separated by dots, like 1.2.43
diff --git a/pubspec.lock b/pubspec.lock
index 38d864d304..fbba4e7423 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -1,41 +1,34 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
-  archive:
-    dependency: transitive
-    description:
-      name: archive
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.13"
-  args:
-    dependency: transitive
-    description:
-      name: args
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.6.0"
   async:
     dependency: transitive
     description:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.4.1"
+    version: "2.5.0-nullsafety.1"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.0-nullsafety.1"
+  characters:
+    dependency: transitive
+    description:
+      name: characters
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0-nullsafety.3"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.3"
+    version: "1.2.0-nullsafety.1"
   chewie:
     dependency: "direct main"
     description:
@@ -50,13 +43,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.0+1"
+  clock:
+    dependency: transitive
+    description:
+      name: clock
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0-nullsafety.1"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.14.12"
+    version: "1.15.0-nullsafety.3"
   convert:
     dependency: transitive
     description:
@@ -64,13 +64,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.1"
-  crypto:
-    dependency: transitive
-    description:
-      name: crypto
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.4"
   css_colors:
     dependency: "direct main"
     description:
@@ -84,7 +77,14 @@ packages:
       name: csslib
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.16.1"
+    version: "0.16.2"
+  fake_async:
+    dependency: transitive
+    description:
+      name: fake_async
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0-nullsafety.1"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -96,7 +96,7 @@ packages:
       name: flutter_svg
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.17.4"
+    version: "0.19.1"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -113,28 +113,21 @@ packages:
       name: html
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.14.0+3"
-  image:
-    dependency: transitive
-    description:
-      name: image
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.12"
+    version: "0.14.0+4"
   matcher:
     dependency: transitive
     description:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.6"
+    version: "0.12.10-nullsafety.1"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.8"
+    version: "1.3.0-nullsafety.3"
   open_iconic_flutter:
     dependency: transitive
     description:
@@ -148,14 +141,14 @@ packages:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.4"
+    version: "1.8.0-nullsafety.1"
   path_drawing:
     dependency: transitive
     description:
       name: path_drawing
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.1"
+    version: "0.4.1+1"
   path_parsing:
     dependency: transitive
     description:
@@ -169,14 +162,7 @@ packages:
       name: petitparser
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.4.0"
-  quiver:
-    dependency: transitive
-    description:
-      name: quiver
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.3"
+    version: "3.1.0"
   screen:
     dependency: transitive
     description:
@@ -195,98 +181,98 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.8.0-nullsafety.2"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.9.3"
+    version: "1.10.0-nullsafety.1"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.0-nullsafety.1"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.5"
+    version: "1.1.0-nullsafety.1"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0-nullsafety.1"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.15"
+    version: "0.2.19-nullsafety.2"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.6"
+    version: "1.3.0-nullsafety.3"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.8"
+    version: "2.1.0-nullsafety.3"
   video_player:
     dependency: "direct main"
     description:
       name: video_player
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.10.10"
+    version: "0.10.12+5"
   video_player_platform_interface:
     dependency: transitive
     description:
       name: video_player_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.2"
+    version: "2.2.0"
   video_player_web:
     dependency: transitive
     description:
       name: video_player_web
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.3"
+    version: "0.1.4+1"
   wakelock:
     dependency: transitive
     description:
       name: wakelock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.3+4"
+    version: "0.1.4+2"
   webview_flutter:
     dependency: "direct main"
     description:
       name: webview_flutter
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.21"
+    version: "0.3.24"
   xml:
     dependency: transitive
     description:
       name: xml
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.6.1"
+    version: "4.5.1"
 sdks:
-  dart: ">=2.7.0 <3.0.0"
-  flutter: ">=1.17.0 <2.0.0"
+  dart: ">=2.10.0-110 <2.11.0"
+  flutter: ">=1.18.0-6.0.pre <2.0.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 79d2362932..0a42676f7d 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -26,7 +26,7 @@ dependencies:
   chewie_audio: ^1.0.0+1
 
   # Plugins for rendering the <svg> tag.
-  flutter_svg: ^0.17.4
+  flutter_svg: ^0.19.1
 
   flutter:
     sdk: flutter