message: fix: pin for Node 12 support
diff: "@google-cloud/projectify": "^3.0.0",
  "@google-cloud/promisify": "^2.0.0",
  "@opentelemetry/api": "^1.0.0",
  - "@opentelemetry/semantic-conventions": "^1.0.0",
  + "@opentelemetry/semantic-conventions": "~1.3.0",
  "@types/duplexify": "^3.6.0",
  "@types/long": "^4.0.0",
  "arrify": "^2.0.0",
  