build: use config file for linkinator (#275)

Author: JustinBeckwith

packages/google-cloud-monitoring/linkinator.config.json

@@ -0,0 +1,7 @@
+{
+  "recurse": true,
+  "skip": [
+    "https://codecov.io/gh/googleapis/",
+    "www.googleapis.com"
+  ]
+}

packages/google-cloud-monitoring/package.json

@@ -38,7 +38,7 @@
     "test-no-cover": "mocha test/*.js",
     "test": "npm run cover",
     "fix": "eslint '**/*.js' --fix",
-    "docs-test": "linkinator docs -r --skip www.googleapis.com",
+    "docs-test": "linkinator docs",
     "predocs-test": "npm run docs"
   },
   "dependencies": {
@@ -58,6 +58,6 @@
     "nyc": "^14.0.0",
     "power-assert": "^1.4.4",
     "prettier": "^1.7.4",
-    "linkinator": "^1.1.2"
+    "linkinator": "^1.5.0"
   }
 }