fix(package): update get-stdin to version 8.0.0

Closes #12

Author: greenkeeper[bot]

package.json

@@ -127,7 +127,7 @@
     "chalk": "^2.3.0",
     "conf": "^1.4.0",
     "core-js": "^2.5.3",
-    "get-stdin": "^5.0.1",
+    "get-stdin": "^8.0.0",
     "meow": "^4.0.0",
     "ora": "^1.3.0",
     "update-notifier": "^2.3.0"