Update yeoman-generator to version 0.23.2 🚀

[greenkeeperio-bot]

Hello :wave:

:rocket::rocket::rocket:

yeoman-generator just published its new version 0.23.2, which is not covered by your current version range.

If this pull request passes your tests you can publish your software with the latest version of yeoman-generator – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging :palm_tree:

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The new version differs by 21 commits .

• a55558a 0.23.2
• b89eece Fix for Node < 4, downgrade path-exists (#928)
• bbc05cc Fix tests on newer Node verions
• f668360 add node v6
• 0644986 0.23.1
• f733835 Fix yeoman-generator ignoring errors
• 7d0aa14 0.23.0
• 4bdf621 Base#prompt now return a promise
• 2d90140 Move inquirer to devDeps
• ca55109 Bump devDeps and eslint 2.0 settings adjustment
• 3272f44 Bump some dependencies
• 3a41fa0 0.22.6
• 634a9c7 Fix the error thrown from generator is swallowed (#923)
• edfa8a0 Fix storage documentation
• 8e767d4 Add sponsors to Readme

There are 21 commits in total. See the full diff.

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