fix: update dependency @types/js-yaml to ^3.12.4, update test script (#…

…487)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [@types/js-yaml](https://github.com/DefinitelyTyped/DefinitelyTyped) | dependencies | patch | [`^3.12.3` -> `^3.12.4`](https://renovatebot.com/diffs/npm/@types%2fjs-yaml/3.12.3/3.12.4) |

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package.json

@@ -34,11 +34,11 @@
     "lint": "gts check",
     "prepack": "npm run compile && cd templates/typescript_gapic && rm -f package.json.njk && mv package.json package.json.njk && cd ../.. && mkdir -p build && cp -rf bazel-bin/src bazel-bin/protos.js templates build/",
     "postpack": "cd templates/typescript_gapic && mv package.json.njk package.json && ln -s package.json package.json.njk",
-    "test": "bazel test //:unit-tests",
+    "test": "bazel test //:unit_tests",
     "ts-test-application": "mocha bazel-bin/test/test-application/test-ts --timeout 600000"
   },
   "dependencies": {
-    "@types/js-yaml": "^3.12.3",
+    "@types/js-yaml": "^3.12.4",
     "file-system": "^2.2.2",
     "fs-extra": "^9.0.0",
     "get-stdin": "^8.0.0",