Dedupe frontend dependencies

yarn.lock

@@ -9129,16 +9129,7 @@ postcss@^6.0.1, postcss@^6.0.23:
     source-map "^0.6.1"
     supports-color "^5.4.0"
 
-postcss@^7.0.0, postcss@^7.0.1, postcss@^7.0.14, postcss@^7.0.17, postcss@^7.0.2, postcss@^7.0.7:
-  version "7.0.21"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.21.tgz#06bb07824c19c2021c5d056d5b10c35b989f7e17"
-  integrity sha512-uIFtJElxJo29QC753JzhidoAhvp/e/Exezkdhfmt8AymWT6/5B7W1WmponYWkHk2eg6sONyTch0A3nkMPun3SQ==
-  dependencies:
-    chalk "^2.4.2"
-    source-map "^0.6.1"
-    supports-color "^6.1.0"
-
-postcss@^7.0.27:
+postcss@^7.0.0, postcss@^7.0.1, postcss@^7.0.14, postcss@^7.0.17, postcss@^7.0.2, postcss@^7.0.27, postcss@^7.0.7:
   version "7.0.27"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.27.tgz#cc67cdc6b0daa375105b7c424a85567345fc54d9"
   integrity sha512-WuQETPMcW9Uf1/22HWUWP9lgsIC+KEHg2kozMflKjbeUtw9ujvFX6QmIfozaErDkmLWS9WEnEdEe6Uo9/BNTdQ==
@@ -12004,18 +11995,7 @@ webpack-cli@^3.3.11:
     v8-compile-cache "2.0.3"
     yargs "13.2.4"
 
-webpack-dev-middleware@^3.7.0:
-  version "3.7.1"
-  resolved "https://registry.yarnpkg.com/webpack-dev-middleware/-/webpack-dev-middleware-3.7.1.tgz#1167aea02afa034489869b8368fe9fed1aea7d09"
-  integrity sha512-5MWu9SH1z3hY7oHOV6Kbkz5x7hXbxK56mGHNqHTe6d+ewxOwKUxoUJBs7QIaJb33lPjl9bJZ3X0vCoooUzC36A==
-  dependencies:
-    memory-fs "^0.4.1"
-    mime "^2.4.4"
-    mkdirp "^0.5.1"
-    range-parser "^1.2.1"
-    webpack-log "^2.0.0"
-
-webpack-dev-middleware@^3.7.2:
+webpack-dev-middleware@^3.7.0, webpack-dev-middleware@^3.7.2:
   version "3.7.2"
   resolved "https://registry.yarnpkg.com/webpack-dev-middleware/-/webpack-dev-middleware-3.7.2.tgz#0019c3db716e3fa5cecbf64f2ab88a74bab331f3"
   integrity sha512-1xC42LxbYoqLNAhV6YzTYacicgMZQTqRd27Sim9wn5hJrX3I5nxYy1SxSd4+gjUFsz1dQFj+yEe6zEVmSkeJjw==