Bump postcss from 8.2.9 to 8.2.10 in /build/javascript (#918)

Bumps [postcss](https://github.com/postcss/postcss) from 8.2.9 to 8.2.10.
- [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/8.2.9...8.2.10)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build/javascript/package-lock.json

@@ -1507,9 +1507,9 @@
       }
     },
     "postcss": {
-      "version": "8.2.9",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.2.9.tgz",
-      "integrity": "sha512-b+TmuIL4jGtCHtoLi+G/PisuIl9avxs8IZMSmlABRwNz5RLUUACrC+ws81dcomz1nRezm5YPdXiMEzBEKgYn+Q==",
+      "version": "8.2.10",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.2.10.tgz",
+      "integrity": "sha512-b/h7CPV7QEdrqIxtAf2j31U5ef05uBDuvoXv6L51Q4rcS1jdlXAVKJv+atCFdUXYl9dyTHGyoMzIepwowRJjFw==",
       "dev": true,
       "requires": {
         "colorette": "^1.2.2",

build/javascript/package.json

@@ -16,7 +16,7 @@
   },
   "devDependencies": {
     "cssnano": "^5.0.0",
-    "postcss": "^8.2.9",
+    "postcss": "^8.2.10",
     "postcss-cli": "^8.3.1"
   },
   "snowpack": {