Update postcss-selector-parser to version 6.0.12

Author: depfu[bot]

package.json

@@ -89,7 +89,7 @@
     "postcss-js": "^4.0.1",
     "postcss-load-config": "^4.0.1",
     "postcss-nested": "^6.0.1",
-    "postcss-selector-parser": "^6.0.11",
+    "postcss-selector-parser": "^6.0.12",
     "postcss-value-parser": "^4.2.0",
     "resolve": "^1.22.3",
     "sucrase": "^3.32.0"