fix(@angular-devkit/build-angular): update to postcss 8.2.15

Closes #20888

Author: alan-agius4

package.json

@@ -192,7 +192,7 @@
     "pidusage": "^2.0.17",
     "pnp-webpack-plugin": "1.6.4",
     "popper.js": "^1.14.1",
-    "postcss": "8.2.14",
+    "postcss": "8.2.15",
     "postcss-import": "14.0.0",
     "postcss-loader": "4.2.0",
     "prettier": "^2.0.0",

packages/angular_devkit/build_angular/package.json

@@ -50,7 +50,7 @@
     "ora": "5.3.0",
     "parse5-html-rewriting-stream": "6.0.1",
     "pnp-webpack-plugin": "1.6.4",
-    "postcss": "8.2.14",
+    "postcss": "8.2.15",
     "postcss-import": "14.0.0",
     "postcss-loader": "4.2.0",
     "raw-loader": "4.0.2",

yarn.lock

@@ -8063,10 +8063,10 @@ nanoid@^3.1.20:
   resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.1.20.tgz#badc263c6b1dcf14b71efaa85f6ab4c1d6cfc788"
   integrity sha512-a1cQNyczgKbLX9jwbS/+d7W8fX/RfgYR7lVWwWOGIPNgK2m0MWvrGF6/m4kk6U3QcFMnZf3RIhL0v2Jgh/0Uxw==
 
-nanoid@^3.1.22:
-  version "3.1.22"
-  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.1.22.tgz#b35f8fb7d151990a8aebd5aa5015c03cf726f844"
-  integrity sha512-/2ZUaJX2ANuLtTvqTlgqBQNJoQO398KyJgZloL0PZkC0dpysjncRUPsFe3DUPzz/y3h+u7C46np8RMuvF3jsSQ==
+nanoid@^3.1.23:
+  version "3.1.23"
+  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.1.23.tgz#f744086ce7c2bc47ee0a8472574d5c78e4183a81"
+  integrity sha512-FiB0kzdP0FFVGDKlRLEQ1BgDzU87dy5NnzjeW9YZNt+/c3+q82EQDUwniSAUxp/F0gFNI1ZhKU1FqYsMuqZVnw==
 
 nanomatch@^1.2.9:
   version "1.2.13"
@@ -9657,13 +9657,13 @@ postcss-value-parser@^4.0.0, postcss-value-parser@^4.0.2, postcss-value-parser@^
     source-map "^0.6.1"
     supports-color "^6.1.0"
 
-[email protected].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==
+[email protected].15:
+  version "8.2.15"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.2.15.tgz#9e66ccf07292817d226fc315cbbf9bc148fbca65"
+  integrity sha512-2zO3b26eJD/8rb106Qu2o7Qgg52ND5HPjcyQiK2B98O388h43A448LCslC0dI2P97wCAQRJsFvwTRcXxTKds+Q==
   dependencies:
     colorette "^1.2.2"
-    nanoid "^3.1.22"
+    nanoid "^3.1.23"
     source-map "^0.6.1"
 
 postcss@^8.1.4: