chore(package): update cpy-cli to version 3.1.1

Closes #135

Author: greenkeeper[bot]

package.json

@@ -47,7 +47,7 @@
     "classnames": "^2.2.6",
     "codecov": "^3.1.0",
     "coveralls": "^3.0.2",
-    "cpy-cli": "^2.0.0",
+    "cpy-cli": "^3.1.1",
     "cross-env": "^5.2.0",
     "css-modules-require-hook": "^4.2.3",
     "eslint": "^5.12.0",