Bump protobufjs to 6.x (#411)

Author: duxet

package-lock.json

@@ -46,7 +46,6 @@
     "@types/mocha": "^5.2.5",
     "@types/nock": "^9.1.3",
     "@types/node": "^10.12.12",
-    "@types/protobufjs": "^5.0.31",
     "@types/semver": "^5.5.0",
     "@types/shimmer": "^1.0.1",
     "@types/uuid": "^3.4.3",
@@ -56,7 +55,7 @@
     "ncp": "^2.0.0",
     "nock": "^10.0.0",
     "nyc": "^13.0.0",
-    "protobufjs": "^5.0.3",
+    "protobufjs": "^6.8.8",
     "rimraf": "^2.6.2",
     "ts-node": "^8.0.0",
     "typescript": "~2.8.3"

packages/opencensus-instrumentation-grpc/package-lock.json

@@ -5,7 +5,7 @@
     "rootDir": ".",
     "outDir": "build",
     "pretty": true,
-    "lib": ["es2016", "dom"],
+    "lib": ["es2016"],
     "module": "commonjs",
     "target": "es6",
     "strictNullChecks": true,