feat: add a --ci option

[bdubaut]

Description

This PR adds a --ci option to the mix git_ops.release task. as a result there will not be an exception to be raised when there is no version to build. This should felp people with CI pipelines that make releases for them.

Usage

In your CI job:

mix git_ops.release --ci --yes

Contributor checklist

• My commit messages follow the Conventional Commit Message Format
  For example: fix: Multiply by appropriate coefficient, or
  feat(Calculator): Correctly preserve history
  Any explanation or long form information in your commit message should be
  in a separate paragraph, separated by a blank line from the primary message
• Features include unit/acceptance tests

closes #48

[sourcelevel-bot]

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[coveralls]

Pull Request Test Coverage Report for Build 174

• 5 of 5 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.8%) to 84.395%

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Totals
Change from base Build 173:	0.8%
Covered Lines:	265
Relevant Lines:	314

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💛 - Coveralls