build: use linkinator for docs test (#1596)

package.json

@@ -35,7 +35,7 @@
     "pregenerate": "npm run build-tools",
     "generate": "node build/src/generator/generate.js",
     "postgenerate": "npm run fix",
-    "docs-test": "blcl docs -r --exclude www.googleapis.com",
+    "docs-test": "linkinator docs -r --skip www.googleapis.com",
     "predocs-test": "npm run docs"
   },
   "author": "Google Inc.",
@@ -100,6 +100,6 @@
     "source-map-support": "^0.5.5",
     "tmp": "^0.0.33",
     "typescript": "~3.3.0",
-    "broken-link-checker-local": "^0.2.0"
+    "linkinator": "^1.1.2"
   }
 }