Bump postcss from 8.2.5 to 8.2.6

Bumps [postcss](https://github.com/postcss/postcss) from 8.2.5 to 8.2.6.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.2.5...8.2.6)

Signed-off-by: dependabot[bot] <support@github.com>

package-lock.json

@@ -11425,9 +11425,9 @@
             "dev": true
         },
         "postcss": {
-            "version": "8.2.5",
-            "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.2.5.tgz",
-            "integrity": "sha512-wMcb7BpDcm3gxQOQx46NDNT36Kk0Ao6PJLLI2ed5vehbbbxCEuslSQzbQ2sfSKy+gkYxhWcGWSeaK+gwm4KIZg==",
+            "version": "8.2.6",
+            "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.2.6.tgz",
+            "integrity": "sha512-xpB8qYxgPuly166AGlpRjUdEYtmOWx2iCwGmrv4vqZL9YPVviDVPZPRXxnXr6xPZOdxQ9lp3ZBFCRgWJ7LE3Sg==",
             "dev": true,
             "requires": {
                 "colorette": "^1.2.1",

package.json

@@ -70,7 +70,7 @@
         "gulp-typescript": "^6.0.0-alpha.1",
         "gulp-zip": "^5.0.2",
         "merge-stream": "^2.0.0",
-        "postcss": "^8.2.5",
+        "postcss": "^8.2.6",
         "sass": "^1.32.7",
         "terser": "^5.5.1",
         "tsify": "^5.0.2",