Update dependencies + fix a few tests (#448)

* Add semistandard as a devDependency

* Fix storage tests

* Fix language tests

* Update (some) dependencies

* Fix language slackbot tests

Author: Ace Nassri

error-reporting/package.json

@@ -20,15 +20,15 @@
     "test": "npm run system-test"
   },
   "dependencies": {
-    "@google-cloud/error-reporting": "0.1.3",
+    "@google-cloud/error-reporting": "0.2.1",
     "express": "4.15.3",
     "yargs": "8.0.2"
   },
   "devDependencies": {
-    "@google-cloud/nodejs-repo-tools": "1.4.15",
-    "ava": "0.19.1",
+    "@google-cloud/nodejs-repo-tools": "1.4.16",
+    "ava": "0.21.0",
     "proxyquire": "1.8.0",
-    "sinon": "2.3.5"
+    "sinon": "3.0.0"
   },
   "cloud-repo-tools": {
     "requiresKeyFile": true,