Add print_version and replace_version to module.py

[balopat]

Adds print_version and replace_version to dev_tools/modules.py.

This helps with #4129 - automating releases.

[balopat]

@MichaelBroughton - in preparation for our v0.12 release.

[MichaelBroughton]

LGTM

[MichaelBroughton]

Consider using regex from here: https://semver.org/

[balopat]

Oh, cool, didn't know about it - however, interestingly it doesn't seem to match 1.2.3.dev

[balopat]

It does match 1.2.3-dev...hmmm...

[CirqBot]

Automerge cancelled: A required status check is not present.

Missing statuses: ['Build docs', 'Build protos', 'Changed files test', 'Coverage check', 'Doc test', 'Format check', 'Lint check', 'Misc check', 'Notebook formatting', 'Pytest MacOS (3.7)', 'Pytest MacOS (3.8)', 'Pytest MacOS (3.9)', 'Pytest Ubuntu (3.7)', 'Pytest Ubuntu (3.8)', 'Pytest Ubuntu (3.9)', 'Pytest Windows (3.7)', 'Pytest Windows (3.8)', 'Pytest Windows (3.9)', 'Type check', 'Typescript lint check', 'Typescript tests', 'Typescript tests coverage']

[CirqBot]

Automerge cancelled: A required status check is not present.

Missing statuses: ['Build docs', 'Build protos', 'Changed files test', 'Coverage check', 'Doc test', 'Format check', 'Lint check', 'Misc check', 'Notebook formatting', 'Pytest MacOS (3.7)', 'Pytest MacOS (3.8)', 'Pytest MacOS (3.9)', 'Pytest Ubuntu (3.7)', 'Pytest Ubuntu (3.8)', 'Pytest Ubuntu (3.9)', 'Pytest Windows (3.7)', 'Pytest Windows (3.8)', 'Pytest Windows (3.9)', 'Type check', 'Typescript lint check', 'Typescript tests', 'Typescript tests coverage']