run the cli tests as part of npm t

Author: Jake Champion

package.json

@@ -25,7 +25,8 @@
     "CHANGELOG.md"
   ],
   "scripts": {
-    "test": "tsd",
+    "test": "npm run test:types && npm run test:cli",
+    "test:cli": "brittle --bail integration-tests/cli/**.test.js",
     "test:types": "tsd",
     "docs": "npm run docs:clean && npm run docs:typedoc",
     "docs:clean": "rm -rf reference-docs",