build: use config file for linkinator (#212)

Author: JustinBeckwith

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

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

packages/google-cloud-oslogin/package.json

@@ -37,7 +37,7 @@
     "docs": "jsdoc -c .jsdoc.js",
     "system-test": "mocha system-test/*.js smoke-test/*.js --timeout 600000",
     "fix": "eslint --fix '**/*.js'",
-    "docs-test": "linkinator docs -r --skip www.googleapis.com",
+    "docs-test": "linkinator docs",
     "predocs-test": "npm run docs"
   },
   "dependencies": {
@@ -56,6 +56,6 @@
     "nyc": "^14.0.0",
     "power-assert": "^1.4.4",
     "prettier": "^1.9.2",
-    "linkinator": "^1.1.2"
+    "linkinator": "^1.5.0"
   }
 }