fix(deps): update dependency chalk to v^2.0.0 (#141)

Author: renovate[bot]

@commitlint/prompt/package.json

@@ -68,7 +68,7 @@
   "dependencies": {
     "@commitlint/core": "^5.0.1",
     "babel-runtime": "^6.23.0",
-    "chalk": "^1.1.1",
+    "chalk": "^2.0.0",
     "lodash": "^4.17.4",
     "throat": "^4.1.0",
     "vorpal": "^1.10.0"