Bump postcss-loader from 2.1.2 to 2.1.3

Bumps [postcss-loader](https://github.com/postcss/postcss-loader) from 2.1.2 to 2.1.3.
- [Release notes](https://github.com/postcss/postcss-loader/releases)
- [Changelog](https://github.com/postcss/postcss-loader/blob/master/CHANGELOG.md)
- [Commits](webpack/postcss-loader@v2.1.2...v2.1.3)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot-support

package.json

@@ -48,7 +48,7 @@
     "path-complete-extname": "^1.0.0",
     "payment": "^2.3.0",
     "popper.js": "^1.14.1",
-    "postcss-loader": "^2.1.2",
+    "postcss-loader": "^2.1.3",
     "postcss-smart-import": "^0.7.6",
     "precss": "^3.1.2",
     "prop-types": "^15.6.1",

yarn.lock

@@ -6632,9 +6632,9 @@ postcss-load-plugins@^2.3.0:
     cosmiconfig "^2.1.1"
     object-assign "^4.1.0"
 
-postcss-loader@^2.1.0, postcss-loader@^2.1.2:
-  version "2.1.2"
-  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-2.1.2.tgz#03f54e23be736c9ea4f610e17d2a299254c05130"
+postcss-loader@^2.1.0, postcss-loader@^2.1.3:
+  version "2.1.3"
+  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-2.1.3.tgz#eb210da734e475a244f76ccd61f9860f5bb3ee09"
   dependencies:
     loader-utils "^1.1.0"
     postcss "^6.0.0"