chore: release 4.0.0 (#266)

Author: Benjamin E. Coe

translate/package.json

@@ -12,7 +12,7 @@
   },
   "dependencies": {
     "@google-cloud/automl": "^0.2.0",
-    "@google-cloud/translate": "^3.0.1",
+    "@google-cloud/translate": "^4.0.0",
     "yargs": "^13.0.0"
   },
   "devDependencies": {