Bump @web/test-runner from 0.20.0 to 0.20.1 (#281)

Bumps [@web/test-runner](https://github.com/modernweb-dev/web/tree/HEAD/packages/test-runner) from 0.20.0 to 0.20.1.
- [Release notes](https://github.com/modernweb-dev/web/releases)
- [Changelog](https://github.com/modernweb-dev/web/blob/master/packages/test-runner/CHANGELOG.md)
- [Commits](https://github.com/modernweb-dev/web/commits/@web/test-runner@0.20.1/packages/test-runner)

---
updated-dependencies:
- dependency-name: "@web/test-runner"
  dependency-version: 0.20.1
  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>

Author: dependabot[bot]

yarn.lock

@@ -998,14 +998,13 @@
     "@types/parse5" "^6.0.1"
     parse5 "^6.0.1"
 
-"@web/test-runner-chrome@^0.18.0":
-  version "0.18.0"
-  resolved "https://registry.yarnpkg.com/@web/test-runner-chrome/-/test-runner-chrome-0.18.0.tgz#9d2a9633a7e312c0c7544382351959111bb629e5"
-  integrity sha512-EkB70HtHwY36pIbgn9HzqtKAv+i53qa0/UBrs+H0m8j24TxIEH9oWIdF9O/RFxjYpla7fIvZMhOFOjejgrRU5g==
+"@web/test-runner-chrome@^0.18.1":
+  version "0.18.1"
+  resolved "https://registry.yarnpkg.com/@web/test-runner-chrome/-/test-runner-chrome-0.18.1.tgz#490a371990084b8d050dd778bd58e47d21522332"
+  integrity sha512-eO6ctCaqSguGM6G3cFobGHnrEs9wlv9Juj/Akyr4XLjeEMTheNULdvOXw9Bygi+QC/ir/0snMmt+/YKnfy8rYA==
   dependencies:
     "@web/test-runner-core" "^0.13.0"
     "@web/test-runner-coverage-v8" "^0.8.0"
-    async-mutex "0.4.0"
     chrome-launcher "^0.15.0"
     puppeteer-core "^24.0.0"
 
@@ -1068,14 +1067,14 @@
     "@web/test-runner-core" "^0.13.0"
 
 "@web/test-runner@^0.20.0":
-  version "0.20.0"
-  resolved "https://registry.yarnpkg.com/@web/test-runner/-/test-runner-0.20.0.tgz#b6b9d5041718bcdaa47354bdaaaf6a1f2fcff6df"
-  integrity sha512-xN+4wgEm5xh0VSiC08eUYXW0QDt/NuzZyey4s7Nnjyjs9NkuJHd1jG9aNzfgL1edpJJ/RldHc0KiM2to1h2kxQ==
+  version "0.20.1"
+  resolved "https://registry.yarnpkg.com/@web/test-runner/-/test-runner-0.20.1.tgz#d130e11dd7939fb981d52a745e2124e6232a359a"
+  integrity sha512-MTN8D1WCeCdkUWJIeG9yauUbRkk9g0zGFnBbI5smtPE91NpXFMfRd8nShIvxQnHx9fNTmK+OCYKnOSlq5DLLVA==
   dependencies:
     "@web/browser-logs" "^0.4.0"
     "@web/config-loader" "^0.3.0"
     "@web/dev-server" "^0.4.0"
-    "@web/test-runner-chrome" "^0.18.0"
+    "@web/test-runner-chrome" "^0.18.1"
     "@web/test-runner-commands" "^0.9.0"
     "@web/test-runner-core" "^0.13.0"
     "@web/test-runner-mocha" "^0.9.0"
@@ -1259,13 +1258,6 @@ astral-regex@^2.0.0:
   resolved "https://registry.yarnpkg.com/astral-regex/-/astral-regex-2.0.0.tgz#483143c567aeed4785759c0865786dc77d7d2e31"
   integrity sha512-Z7tMw1ytTXt5jqMcOP+OQteU1VuNK9Y02uuJtKQ1Sv69jXQKKg5cibLwGJow8yzZP+eAc18EmLGPal0bp36rvQ==
 
-async-mutex@0.4.0:
-  version "0.4.0"
-  resolved "https://registry.yarnpkg.com/async-mutex/-/async-mutex-0.4.0.tgz#ae8048cd4d04ace94347507504b3cf15e631c25f"
-  integrity sha512-eJFZ1YhRR8UN8eBLoNzcDPcy/jqjsg6I1AP+KvWQX80BqOSW1oJPJXDylPUEeMr2ZQvHgnQ//Lp6f3RQ1zI7HA==
-  dependencies:
-    tslib "^2.4.0"
-
 async@^2.6.4:
   version "2.6.4"
   resolved "https://registry.yarnpkg.com/async/-/async-2.6.4.tgz#706b7ff6084664cd7eae713f6f965433b5504221"
@@ -4157,7 +4149,7 @@ ts-api-utils@^1.0.1:
   resolved "https://registry.yarnpkg.com/ts-api-utils/-/ts-api-utils-1.0.3.tgz#f12c1c781d04427313dbac808f453f050e54a331"
   integrity sha512-wNMeqtMz5NtwpT/UZGY5alT+VoKdSsOOP/kqHFcUW1P/VRhH2wJ48+DN2WwUliNbQ976ETwDL0Ifd2VVvgonvg==
 
-tslib@^2.0.1, tslib@^2.1.0, tslib@^2.4.0, tslib@^2.6.2, tslib@^2.8.1:
+tslib@^2.0.1, tslib@^2.1.0, tslib@^2.6.2, tslib@^2.8.1:
   version "2.8.1"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.8.1.tgz#612efe4ed235d567e8aba5f2a5fab70280ade83f"
   integrity sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==