Bump webextension-polyfill from 0.10.0 to 0.12.0 (#140)

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

Author: dependabot[bot]

package.json

@@ -27,7 +27,7 @@
         "validator": "^13.12.0",
         "webext-dynamic-content-scripts": "^10.0.2",
         "webext-permission-toggle": "^5.0.2",
-        "webextension-polyfill": "^0.10.0"
+        "webextension-polyfill": "^0.12.0"
     },
     "devDependencies": {
         "@ianvs/prettier-plugin-sort-imports": "4.1.0",