Update dependency postcss to v8.3.0 (#681)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

package.json

@@ -50,7 +50,7 @@
 		"mini-css-extract-plugin": "1.6.0",
 		"node-sass": "6.0.0",
 		"node-sass-magic-importer": "5.3.2",
-		"postcss": "8.2.15",
+		"postcss": "8.3.0",
 		"postcss-cli": "8.3.1",
 		"postcss-easy-import": "3.0.0",
 		"postcss-flexbugs-fixes": "5.0.2",

yarn.lock

@@ -8831,14 +8831,14 @@ postcss@7.0.7:
     source-map "^0.6.1"
     supports-color "^5.5.0"
 
-postcss@8.2.15, postcss@^8.2.15:
-  version "8.2.15"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.2.15.tgz#9e66ccf07292817d226fc315cbbf9bc148fbca65"
-  integrity sha512-2zO3b26eJD/8rb106Qu2o7Qgg52ND5HPjcyQiK2B98O388h43A448LCslC0dI2P97wCAQRJsFvwTRcXxTKds+Q==
+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 "^3.1.23"
-    source-map "^0.6.1"
+    source-map-js "^0.6.2"
 
 postcss@^6.0.1, postcss@^6.0.11, postcss@^6.0.14:
   version "6.0.23"
@@ -8867,6 +8867,15 @@ postcss@^8.2.10:
     nanoid "^3.1.22"
     source-map "^0.6.1"
 
+postcss@^8.2.15:
+  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 "^3.1.23"
+    source-map "^0.6.1"
+
 prebuild-install@^5.3.5:
   version "5.3.6"
   resolved "https://registry.yarnpkg.com/prebuild-install/-/prebuild-install-5.3.6.tgz#7c225568d864c71d89d07f8796042733a3f54291"
@@ -10084,6 +10093,11 @@ source-list-map@^2.0.0, source-list-map@^2.0.1:
   resolved "https://registry.yarnpkg.com/source-list-map/-/source-list-map-2.0.1.tgz#3993bd873bfc48479cca9ea3a547835c7c154b34"
   integrity sha512-qnQ7gVMxGNxsiL4lEuJwe/To8UnK7fAnmbGEEH8RpLouuKbeEm0lhbQVFIrNSuB+G7tVrAlVsZgETT5nljf+Iw==
 
+source-map-js@^0.6.2:
+  version "0.6.2"
+  resolved "https://registry.yarnpkg.com/source-map-js/-/source-map-js-0.6.2.tgz#0bb5de631b41cfbda6cfba8bd05a80efdfd2385e"
+  integrity sha512-/3GptzWzu0+0MBQFrDKzw/DvvMTUORvgY6k6jd/VS6iCR4RDTKWH6v6WPwQoUO8667uQEf9Oe38DxAYWY5F/Ug==
+
 source-map-resolve@^0.5.0:
   version "0.5.3"
   resolved "https://registry.yarnpkg.com/source-map-resolve/-/source-map-resolve-0.5.3.tgz#190866bece7553e1f8f267a2ee82c606b5509a1a"