perf(@angular-devkit/build-angular): update PostCSS to 8.3

This version replaces the `source-map` package with `source-map-js`. This can lead up to 4x performance improvements in parsing map from processing step before PostCSS.

See full changelog: https://github.com/postcss/postcss/releases/tag/8.3.0

package.json

@@ -190,7 +190,7 @@
     "pidtree": "^0.5.0",
     "pidusage": "^2.0.17",
     "popper.js": "^1.14.1",
-    "postcss": "8.2.14",
+    "postcss": "8.3.0",
     "postcss-import": "14.0.1",
     "postcss-loader": "5.2.0",
     "postcss-preset-env": "6.7.0",

packages/angular_devkit/build_angular/package.json

@@ -46,7 +46,7 @@
     "open": "8.0.2",
     "ora": "5.4.0",
     "parse5-html-rewriting-stream": "6.0.1",
-    "postcss": "8.2.14",
+    "postcss": "8.3.0",
     "postcss-import": "14.0.1",
     "postcss-loader": "5.2.0",
     "postcss-preset-env": "6.7.0",

yarn.lock

@@ -9532,14 +9532,14 @@ [email protected], postcss@^7.0.14, postcss@^7.0.17, postcss@^7.0.2, postcss@^7.0.32
     source-map "^0.6.1"
     supports-color "^6.1.0"
 
-postcss@8.2.14:
-  version "8.2.14"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.2.14.tgz#dcf313eb8247b3ce8078d048c0e8262ca565ad2b"
-  integrity sha512-+jD0ZijcvyCqPQo/m/CW0UcARpdFylq04of+Q7RKX6f/Tu+dvpUI/9Sp81+i6/vJThnOBX09Quw0ZLOVwpzX3w==
+postcss@8.3.0:
+  version "8.3.0"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.3.0.tgz#b1a713f6172ca427e3f05ef1303de8b65683325f"
+  integrity sha512-+ogXpdAjWGa+fdYY5BQ96V/6tAo+TdSSIMP5huJBIygdWwKtVoB5JWZ7yUd4xZ8r+8Kvvx4nyg/PQ071H4UtcQ==
   dependencies:
     colorette "^1.2.2"
-    nanoid "^3.1.22"
-    source-map "^0.6.1"
+    nanoid "^3.1.23"
+    source-map-js "^0.6.2"
 
 postcss@^8.2.10, postcss@^8.2.4:
   version "8.2.13"