Update dependency css-loader to v6.7.3

Author: renovate[bot]

package.json

@@ -80,7 +80,7 @@
     "canvas": "2.10.2",
     "classnames": "2.3.1",
     "codecov": "3.8.3",
-    "css-loader": "6.7.2",
+    "css-loader": "6.7.3",
     "enzyme": "3.11.0",
     "enzyme-adapter-react-16": "1.15.6",
     "es-check": "7.0.1",

yarn.lock

@@ -8650,13 +8650,13 @@ css-declaration-sorter@^6.0.3:
   dependencies:
     timsort "^0.3.0"
 
-css-loader@6.7.2:
-  version "6.7.2"
-  resolved "https://registry.yarnpkg.com/css-loader/-/css-loader-6.7.2.tgz#26bc22401b5921686a10fbeba75d124228302304"
-  integrity sha512-oqGbbVcBJkm8QwmnNzrFrWTnudnRZC+1eXikLJl0n4ljcfotgRifpg2a1lKy8jTrc4/d9A/ap1GFq1jDKG7J+Q==
+css-loader@6.7.3:
+  version "6.7.3"
+  resolved "https://registry.yarnpkg.com/css-loader/-/css-loader-6.7.3.tgz#1e8799f3ccc5874fdd55461af51137fcc5befbcd"
+  integrity sha512-qhOH1KlBMnZP8FzRO6YCH9UHXQhVMcEGLyNdb7Hv2cpcmJbW0YrddO+tG1ab5nT41KpHIYGsbeHqxB9xPu1pKQ==
   dependencies:
     icss-utils "^5.1.0"
-    postcss "^8.4.18"
+    postcss "^8.4.19"
     postcss-modules-extract-imports "^3.0.0"
     postcss-modules-local-by-default "^4.0.0"
     postcss-modules-scope "^3.0.0"
@@ -16250,10 +16250,10 @@ postcss@^7.0.14, postcss@^7.0.26, postcss@^7.0.32, postcss@^7.0.36, postcss@^7.0
     source-map "^0.6.1"
     supports-color "^6.1.0"
 
-postcss@^8.4.18:
-  version "8.4.19"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.19.tgz#61178e2add236b17351897c8bcc0b4c8ecab56fc"
-  integrity sha512-h+pbPsyhlYj6N2ozBmHhHrs9DzGmbaarbLvWipMRO7RLS+v4onj26MPFXA5OBYFxyqYhUJK456SwDcY9H2/zsA==
+postcss@^8.4.19:
+  version "8.4.21"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.21.tgz#c639b719a57efc3187b13a1d765675485f4134f4"
+  integrity sha512-tP7u/Sn/dVxK2NnruI4H9BG+x+Wxz6oeZ1cJ8P6G/PZY0IKk4k/63TDsQf2kQq3+qoJeLm2kIBUNlZe3zgb4Zg==
   dependencies:
     nanoid "^3.3.4"
     picocolors "^1.0.0"