Switch to Yarn for CI build. (#290)

Author: jmdobry

packages/google-cloud-dns/samples/package.json

@@ -5,14 +5,11 @@
   "license": "Apache Version 2.0",
   "author": "Google Inc.",
   "scripts": {
-    "test": "cd ..; npm run st -- dns/system-test/*.test.js"
+    "test": "cd ..; npm run st -- --verbose dns/system-test/*.test.js"
   },
   "dependencies": {
     "@google-cloud/dns": "0.4.0",
-    "yargs": "6.5.0"
-  },
-  "devDependencies": {
-    "uuid": "2.0.3"
+    "yargs": "6.6.0"
   },
   "engines": {
     "node": ">=4.3.2"