fix(deps): TypeScript 3.7.0 causes breaking change in typings (#1163)

Author: Benjamin E. Coe

package.json

@@ -95,7 +95,7 @@
     "timekeeper": "^2.0.0",
     "tmp": "0.1.0",
     "ts-node": "^8.0.0",
-    "typescript": "~3.6.0"
+    "typescript": "3.6.4"
   },
   "dependencies": {
     "@google-cloud/common": "^2.0.0",

renovate.json

@@ -14,5 +14,6 @@
       "extends": "packages:linters",
       "groupName": "linters"
     }
-  ]
+  ],
+  "ignoreDeps": ["typescript"]
 }