Run ws-manager-api typescript tests

The component defines tests but the tests were never run since leeway
was instructed not to to run tests for this component.

Start running the tests and add the necessary dev dependencies to allow
leeway to run them.

Author: Andrew Farries

components/ws-manager-api/typescript/BUILD.yaml

@@ -8,9 +8,10 @@ packages:
       - "src/*.ts"
       - "src/*.js"
       - package.json
+      - mocha.opts
     config:
       packaging: library
-      dontTest: true
+      dontTest: false
       commands:
         build: ["yarn", "build"]
       yarnLock: ${coreYarnLockBase}/../yarn.lock

components/ws-manager-api/typescript/package.json

@@ -29,6 +29,10 @@
     "grpc-tools": "^1.11.2",
     "grpc_tools_node_protoc_ts": "^5.3.2",
     "typescript": "~4.4.2",
-    "typescript-formatter": "^7.2.2"
+    "typescript-formatter": "^7.2.2",
+    "mocha": "^5.0.0",
+    "mocha-typescript": "^1.1.11",
+    "ts-node": "^9.0.0",
+    "chai": "^4.3.4"
   }
 }