Bumped dependencies to the latest version

Author: leo

package.json

@@ -46,7 +46,7 @@
   },
   "homepage": "https://github.com/zeit/micro#readme",
   "devDependencies": {
-    "ava": "0.18.2",
+    "ava": "0.19.1",
     "coveralls": "2.13.0",
     "eslint-config-prettier": "1.6.0",
     "husky": "0.13.3",
@@ -61,7 +61,7 @@
     "xo": "0.18.1"
   },
   "dependencies": {
-    "args": "2.4.1",
+    "args": "2.4.2",
     "async-to-gen": "1.3.2",
     "bluebird": "3.5.0",
     "boxen": "1.0.0",