Fix security alerts

deployment/deployment-pipelines.yml

@@ -112,7 +112,7 @@ jobs:
   dependsOn: version_number_validation
   condition: succeeded()
   pool:
-    vmImage: 'macOS 10.15'
+    vmImage: 'macOS-10.15'
   strategy:
     matrix:
       Python36:

src/nni_manager/package.json

@@ -48,9 +48,9 @@
     "chai": "^4.1.2",
     "eslint": "^6.7.2",
     "glob": "^7.1.3",
-    "mocha": "^5.2.0",
+    "mocha": "^7.1.1",
     "npx": "^10.2.0",
-    "nyc": "^13.1.0",
+    "nyc": "^15.0.0",
     "request": "^2.87.0",
     "rmdir": "^1.2.0",
     "tmp": "^0.0.33",
@@ -59,7 +59,6 @@
   },
   "resolutions": {
     "mem": "^4.0.0",
-    "handlebars": "^4.5.3",
     "lodash": "^4.17.13",
     "lodash.merge": "^4.6.2",
     "node.extend": "^1.1.7",