Revert "Upgraded style-loader package"

This reverts commit 343a7a5.

package.json

@@ -84,7 +84,7 @@
     "postcss-loader": "2.1.5",
     "sass-loader": "7.0.1",
     "start-server-and-test": "^2.0.0",
-    "style-loader": "3.3.4",
+    "style-loader": "^0.20.3",
     "svgr": "1.9.2",
     "sw-precache-webpack-plugin": "0.11.5",
     "uglifyjs-webpack-plugin": "1.2.5",

yarn.lock

@@ -15055,10 +15055,13 @@ strnum@^1.0.5:
   resolved "https://registry.yarnpkg.com/strnum/-/strnum-1.0.5.tgz#5c4e829fe15ad4ff0d20c3db5ac97b73c9b072db"
   integrity sha512-J8bbNyKKXl5qYcR36TIO8W3mVGVHrmmxsd5PAItGkmyzwJvybiw2IVq5nqd0i4LSNSkB/sx9VHllbfFdr9k1JA==
 
-[email protected]:
-  version "3.3.4"
-  resolved "https://registry.yarnpkg.com/style-loader/-/style-loader-3.3.4.tgz#f30f786c36db03a45cbd55b6a70d930c479090e7"
-  integrity sha512-0WqXzrsMTyb8yjZJHDqwmnwRJvhALK9LfRtRc6B4UTWe8AijYLZYZ9thuJTZc2VfQWINADW/j+LiJnfy2RoC1w==
+style-loader@^0.20.3:
+  version "0.20.3"
+  resolved "https://registry.yarnpkg.com/style-loader/-/style-loader-0.20.3.tgz#ebef06b89dec491bcb1fdb3452e913a6fd1c10c4"
+  integrity sha512-2I7AVP73MvK33U7B9TKlYZAqdROyMXDYSMvHLX43qy3GCOaJNiV6i0v/sv9idWIaQ42Yn2dNv79Q5mKXbKhAZg==
+  dependencies:
+    loader-utils "^1.1.0"
+    schema-utils "^0.4.5"
 
 style-loader@^1.0.0:
   version "1.3.0"