perf: update browserslist

PanJiaChen · PanJiaChen · commit 0353f1a4be0c · 2019-05-24T16:59:08.000+08:00
diff --git a/package.json b/package.json
@@ -58,7 +58,6 @@
   },
   "browserslist": [
     "> 1%",
-    "last 2 versions",
-    "not ie <= 8"
+    "last 2 versions"
   ]
 }
