fix(deps): update dependency @google-cloud/promisify to v1 (#367)

renovate[bot] · JustinBeckwith · commit f1a5bcc5ef6b · 2019-05-03T07:31:09.000-07:00
diff --git a/package.json b/package.json
@@ -42,7 +42,7 @@
     "predocs-test": "npm run docs"
   },
   "dependencies": {
-    "@google-cloud/promisify": "^0.4.0",
+    "@google-cloud/promisify": "^1.0.0",
     "google-gax": "^0.26.0",
     "is": "^3.2.1",
     "lodash.merge": "^4.6.1",
