feat(subscription): support push config auth methods (#504)

Author: yoshi-automation

handwritten/pubsub/package.json

@@ -45,7 +45,7 @@
     "prepare": "npm run compile",
     "pretest": "npm run compile",
     "proto": "npm run proto:pubsub",
-    "proto:pubsub": "mkdir -p proto && pbjs -t static-module -w commonjs -p node_modules/google-proto-files google/pubsub/v1/pubsub.proto | pbts -o proto/pubsub.d.ts -",
+    "proto:pubsub": "mkdir -p proto && pbjs -t static-module -w commonjs -p protos google/pubsub/v1/pubsub.proto | pbts -o proto/pubsub.d.ts -",
     "docs-test": "linkinator docs -r --skip www.googleapis.com",
     "predocs-test": "npm run docs"
   },