Allow postcss-loader 6

Author: bobvandevijver

package.json

@@ -83,7 +83,7 @@
     "less-loader": "^7.0.0 || ^8.0.0 || ^9.0.0",
     "mocha": "^8.2.1",
     "postcss": "^8.1.0",
-    "postcss-loader": "^4.0.0 || ^5.0.0",
+    "postcss-loader": "^4.0.0 || ^5.0.0 || ^6.0.0",
     "preact": "^8.2.1 || ^10.0.0",
     "preact-compat": "^3.17.0",
     "sass": "^1.17.0",

yarn.lock

@@ -5478,14 +5478,14 @@ postcss-discard-overridden@^5.0.1:
   resolved "https://registry.yarnpkg.com/postcss-discard-overridden/-/postcss-discard-overridden-5.0.1.tgz#454b41f707300b98109a75005ca4ab0ff2743ac6"
   integrity sha512-Y28H7y93L2BpJhrdUR2SR2fnSsT+3TVx1NmVQLbcnZWwIUpJ7mfcTC6Za9M2PG6w8j7UQRfzxqn8jU2VwFxo3Q==
 
-"postcss-loader@^4.0.0 || ^5.0.0":
-  version "5.3.0"
-  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-5.3.0.tgz#1657f869e48d4fdb018a40771c235e499ee26244"
-  integrity sha512-/+Z1RAmssdiSLgIZwnJHwBMnlABPgF7giYzTN2NOfr9D21IJZ4mQC1R2miwp80zno9M4zMD/umGI8cR+2EL5zw==
+"postcss-loader@^4.0.0 || ^5.0.0 || ^6.0.0":
+  version "6.1.0"
+  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-6.1.0.tgz#13c800a00b3c7d434a1319a73d85e2df0714cdde"
+  integrity sha512-yA/cXBfACkthZNA2hQxOnaReVfQ6uLmvbEDQzNafpbK40URZJvP/28dL1DG174Gvz3ptkkHbbwDBCh+gXR94CA==
   dependencies:
     cosmiconfig "^7.0.0"
     klona "^2.0.4"
-    semver "^7.3.4"
+    semver "^7.3.5"
 
 postcss-merge-longhand@^5.0.2:
   version "5.0.2"