chore(deps): update dependency google-proto-files to v2 (#796)

Co-authored-by: renovate[bot] <renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

packages/opencensus-exporter-ocagent/package-lock.json

@@ -53,7 +53,7 @@
     "@types/node": "^10.12.12",
     "@types/uuid": "^3.4.3",
     "codecov": "^3.6.2",
-    "google-proto-files": "^1.0.0",
+    "google-proto-files": "^2.0.0",
     "gts": "^1.0.0",
     "mocha": "^7.0.0",
     "nodemon": "^2.0.0",