Bump sass from 1.20.1 to 1.20.3 (#10941)

Bumps [sass](https://github.com/sass/dart-sass) from 1.20.1 to 1.20.3.
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sass/dart-sass/compare/1.20.1...1.20.3)

package.json

@@ -148,7 +148,7 @@
     "requestidlecallback": "^0.3.0",
     "reselect": "^4.0.0",
     "rimraf": "^2.6.3",
-    "sass": "^1.20.1",
+    "sass": "^1.20.3",
     "sass-loader": "^7.0.3",
     "stringz": "^1.0.0",
     "substring-trie": "^1.0.2",

yarn.lock

@@ -8282,10 +8282,10 @@ sass-loader@^7.0.3:
     pify "^3.0.0"
     semver "^5.5.0"
 
-sass@^1.20.1:
-  version "1.20.1"
-  resolved "https://registry.yarnpkg.com/sass/-/sass-1.20.1.tgz#737b901fe072336da540b6d00ec155e2267420da"
-  integrity sha512-BnCawee/L5kVG3B/5Jg6BFwASqUwFVE6fj2lnkVuSXDgQ7gMAhY9a2yPeqsKhJMCN+Wgx0r2mAW7XF/aTF5qtA==
+sass@^1.20.3:
+  version "1.20.3"
+  resolved "https://registry.yarnpkg.com/sass/-/sass-1.20.3.tgz#18284a7bac6eab9cbb80453288473194f29efb84"
+  integrity sha512-kvf+w5XT7FrmFrCKz1gPHqegufG+gxifC8oQesX/s8gkShdeiTqiuvP0c8TvfBwMAuI1YGOgobZQ2KIJGn//jA==
   dependencies:
     chokidar "^2.0.0"