Update postcss to version 8.2.6

Author: depfu[bot]

package.json

@@ -48,7 +48,7 @@
     "eslint-config-prettier": "^7.2.0",
     "eslint-plugin-prettier": "^3.3.1",
     "jest": "^26.6.3",
-    "postcss": "^8.2.4",
+    "postcss": "^8.2.6",
     "prettier": "^2.2.1",
     "rimraf": "^3.0.0"
   },

yarn.lock

@@ -4536,10 +4536,10 @@ postcss@^8.2.1:
     nanoid "^3.1.20"
     source-map "^0.6.1"
 
-postcss@^8.2.4:
-  version "8.2.4"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.2.4.tgz#20a98a39cf303d15129c2865a9ec37eda0031d04"
-  integrity sha512-kRFftRoExRVXZlwUuay9iC824qmXPcQQVzAjbCCgjpXnkdMCJYBu2gTwAaFBzv8ewND6O8xFb3aELmEkh9zTzg==
+postcss@^8.2.6:
+  version "8.2.6"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.2.6.tgz#5d69a974543b45f87e464bc4c3e392a97d6be9fe"
+  integrity sha512-xpB8qYxgPuly166AGlpRjUdEYtmOWx2iCwGmrv4vqZL9YPVviDVPZPRXxnXr6xPZOdxQ9lp3ZBFCRgWJ7LE3Sg==
   dependencies:
     colorette "^1.2.1"
     nanoid "^3.1.20"