Bump webext-base-css from 1.4.3 to 2.1.0

Bumps [webext-base-css](https://github.com/fregante/webext-base-css) from 1.4.3 to 2.1.0.
- [Release notes](https://github.com/fregante/webext-base-css/releases)
- [Commits](fregante/webext-base-css@v1.4.3...v2.1.0)

---
updated-dependencies:
- dependency-name: webext-base-css
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package.json

@@ -38,7 +38,7 @@
     "i18next": "^23.2.6",
     "i18next-browser-languagedetector": "^8.0.2",
     "lodash": "^4.17.21",
-    "webext-base-css": "^1.3.1",
+    "webext-base-css": "^2.1.0",
     "webextension-polyfill": "0.10.0"
   },
   "devDependencies": {

yarn.lock

@@ -8328,10 +8328,10 @@ watchpack@^2.4.1:
     glob-to-regexp "^0.4.1"
     graceful-fs "^4.1.2"
 
-webext-base-css@^1.3.1:
-  version "1.4.3"
-  resolved "https://registry.yarnpkg.com/webext-base-css/-/webext-base-css-1.4.3.tgz#413b28bfca0e65fd42d7652fb963eedaad327191"
-  integrity sha512-LKbDiNn94MTu9Uz1MwgSLjkPIWfBAyt+xpU9Ad+6fy3A7BpxSSFVmqrvcs/6CzaTdRb+5gL1xtLVB/++DZP05g==
+webext-base-css@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/webext-base-css/-/webext-base-css-2.1.0.tgz#3b915cec9874c31c87088cd966a127216a09f1b3"
+  integrity sha512-kzk0RFAIcAFNEFJkNq1xTRf2LDAscJPr4L7ftbd9OpLk7lDU6kbB0rEtysXglI/w2qC1P0cIS6iGKAxwDinDLQ==
 
 webextension-polyfill@0.10.0:
   version "0.10.0"