Move propagation-binaryformat package to dependencies. (#488)

Author: jinmel

packages/opencensus-instrumentation-grpc/package.json

@@ -50,7 +50,6 @@
     "access": "public"
   },
   "devDependencies": {
-    "@opencensus/propagation-binaryformat": "^0.0.11",
     "@types/lodash": "^4.14.109",
     "@types/mocha": "^5.2.5",
     "@types/node": "^10.12.12",
@@ -67,6 +66,7 @@
   },
   "dependencies": {
     "@opencensus/core": "^0.0.11",
+    "@opencensus/propagation-binaryformat": "^0.0.11",
     "grpc": "~1.19.0",
     "lodash": "^4.17.11",
     "object-sizeof": "^1.3.0",