chore(package): update dependencies (#168)

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -21,7 +21,7 @@
   },
   "homepage": "https://github.com/superawesomelabs/leo#readme",
   "dependencies": {
-    "ava": "^0.16.0",
+    "ava": "^0.17.0",
     "babel-cli": "^6.18.0",
     "babel-core": "^6.18.0",
     "babel-eslint": "^7.0.0",
@@ -35,7 +35,7 @@
     "frontmatter-loader": "0.0.1",
     "json-loader": "^0.5.4",
     "memory-fs": "^0.3.0",
-    "nyc": "^8.3.0",
+    "nyc": "^10.0.0",
     "webpack": "^1.13.3"
   },
   "devDependencies": {