Auto release checks

[evert]

hey @mattbishop ,

This is another step towards #32

What this PR does is automatically create a 'release commit' when a github release label is added.

This commit has:

• The package.json version change
• Updates the changelog date
• Re-generates the readme with oclif

[evert]

Note that the last commit in this PR was added by the tool: 95c3543