Bump html-proofer from 3.12.2 to 3.13.0

dependabot-preview[bot] · web-flow · commit 141b7578f6bc · 2019-09-26T14:54:39.000Z
Bumps [html-proofer](https://github.com/gjtorikian/html-proofer) from 3.12.2 to 3.13.0. - [Release notes](https://github.com/gjtorikian/html-proofer/releases) - [Commits](gjtorikian/html-proofer@v3.12.2...v3.13.0) Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
diff --git a/Gemfile.lock b/Gemfile.lock
@@ -84,7 +84,7 @@ GEM
     html-pipeline (2.12.0)
       activesupport (>= 2)
       nokogiri (>= 1.4)
-    html-proofer (3.12.2)
+    html-proofer (3.13.0)
       addressable (~> 2.3)
       mercenary (~> 0.3)
       nokogiri (~> 1.10)
