Bump commander from 3.0.2 to 4.0.1

Bumps [commander](https://github.com/tj/commander.js) from 3.0.2 to 4.0.1.
- [Release notes](https://github.com/tj/commander.js/releases)
- [Changelog](https://github.com/tj/commander.js/blob/master/CHANGELOG.md)
- [Commits](tj/commander.js@v3.0.2...4.0.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

package.json

@@ -35,7 +35,7 @@
     "@babel/parser": "^7.5.5",
     "@babel/types": "^7.5.5",
     "chalk": "^2.0.1",
-    "commander": "^3.0.1",
+    "commander": "^4.0.1",
     "ejs": "^2.5.7",
     "mkdirp": "^0.5.1"
   },

yarn.lock

@@ -1317,10 +1317,10 @@ combined-stream@^1.0.5, combined-stream@~1.0.5:
   dependencies:
     delayed-stream "~1.0.0"
 
-commander@^3.0.1:
-  version "3.0.2"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-3.0.2.tgz#6837c3fb677ad9933d1cfba42dd14d5117d6b39e"
-  integrity sha512-Gar0ASD4BDyKC4hl4DwHqDrmvjoxWKZigVnAbn5H1owvm4CxCPdb0HQDehwNYMJpla5+M2tPmPARzhtYuwpHow==
+commander@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-4.0.1.tgz#b67622721785993182e807f4883633e6401ba53c"
+  integrity sha512-IPF4ouhCP+qdlcmCedhxX4xiGBPyigb8v5NeUp+0LyhwLgxMqyp3S0vl7TAPfS/hiP7FC3caI/PB9lTmP8r1NA==
 
 commondir@^1.0.1:
   version "1.0.1"