Bump postcss from 8.3.6 to 8.3.7 in /build/javascript (#1420)

Bumps [postcss](https://github.com/postcss/postcss) from 8.3.6 to 8.3.7.
- [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/8.3.6...8.3.7)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

@@ -1294,10 +1294,16 @@
         "@babel/runtime": "^7.11.2"
       }
     },
+    "nanocolors": {
+      "version": "0.1.6",
+      "resolved": "https://registry.npmjs.org/nanocolors/-/nanocolors-0.1.6.tgz",
+      "integrity": "sha512-2pvTw6vYRaBLGir2xR7MxaJtyWkrn+C53EpW8yPotG+pdAwBvt0Xwk4VJ6VHLY0aLthVZPvDfm9TdZvrvAm5UQ==",
+      "dev": true
+    },
     "nanoid": {
-      "version": "3.1.23",
-      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.1.23.tgz",
-      "integrity": "sha512-FiB0kzdP0FFVGDKlRLEQ1BgDzU87dy5NnzjeW9YZNt+/c3+q82EQDUwniSAUxp/F0gFNI1ZhKU1FqYsMuqZVnw==",
+      "version": "3.1.25",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.1.25.tgz",
+      "integrity": "sha512-rdwtIXaXCLFAQbnfqDRnI6jaRHp9fTcYBjtFKE8eezcZ7LuLjhUaQGNeMXf1HmRoCH32CLz6XwX0TtxEOS/A3Q==",
       "dev": true
     },
     "node-emoji": {
@@ -1419,13 +1425,13 @@
       }
     },
     "postcss": {
-      "version": "8.3.6",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.3.6.tgz",
-      "integrity": "sha512-wG1cc/JhRgdqB6WHEuyLTedf3KIRuD0hG6ldkFEZNCjRxiC+3i6kkWUUbiJQayP28iwG35cEmAbe98585BYV0A==",
+      "version": "8.3.7",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.3.7.tgz",
+      "integrity": "sha512-9SaY7nnyQ63/WittqZYAvkkYPyKxchMKH71UDzeTmWuLSvxTRpeEeABZAzlCi55cuGcoFyoV/amX2BdsafQidQ==",
       "dev": true,
       "requires": {
-        "colorette": "^1.2.2",
-        "nanoid": "^3.1.23",
+        "nanocolors": "^0.1.5",
+        "nanoid": "^3.1.25",
         "source-map-js": "^0.6.2"
       }
     },

build/javascript/package.json

@@ -16,7 +16,7 @@
   },
   "devDependencies": {
     "cssnano": "^5.0.8",
-    "postcss": "^8.3.6",
+    "postcss": "^8.3.7",
     "postcss-cli": "^8.3.1"
   },
   "snowpack": {