Bump genversion from 3.0.2 to 3.1.1

[dependabot]

Bumps genversion from 3.0.2 to 3.1.1.

Release notes

Sourced from genversion's releases.

v3.1.1

Changes:

• Corrected signature and general improvements in documentation
• Updated dev dependencies
• Set up Travis CI
• Tested to support Node v10 and later

v3.1.0

An almost-breaking change that is solved by running genversion at least once after the upgrade:

• The genversion signature in the generated code has been changed from generated by genversion to Generated by genversion. to better meet comment-styling requirements of some style guides.
• Because of the signature change, the version module will be modified upon the first genversion run after the upgrade. This might cause you to commit a change to your version module in spite of your package version and your genversion formatting options have stayed the same. In other words, just run genversion, commit the change, and everything is okay.
• If you use --check-only flag then you will see the flagged command to exit with code 2 until you run genversion without the flag. Just run genversion without the flag at least once after the upgrade to make --check-only behave as expected.
• The change will break setups that rely on the signature being in all lower case and without trailing dot. We assume there are no such setups and thus chose MINOR version increment instead of MAJOR. Let us know if your setup was broken cuz of this.

New features:

• support xo style guide where the first letter of the first word in a comment must be in upper case. Thanks @​ctranstrum
• support style guides where the comment must end with . dot. Thanks @​Mourula

Minor changes:

• corrected docs for --check-only flag
• improved test suite

Commits

• fbf9c10 Bump v3.1.1
• b4a156b Correct badge url
• 707d57a Add badge for travis build status
• a26794a Drop Node 8 from travis tests
• d265173 Add badge for supported Node versions
• 5a78854 Update dev dependencies
• 2199be5 Set up travis
• b25ecf6 General improvements to readme
• 57a1f05 Add links to related projects
• 70e4886 Update signatures in readme
• Additional commits viewable in compare view

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