Make package version dynamic

[sajith]

Minor maintenance changes:

• Configure package version using setuptools_scm, which is what we do in pce also.
• Add linting tools as an optional dependency in pyproject.toml.
• Install linting tools on CI using the above optional dependency.

[coveralls]

Pull Request Test Coverage Report for Build 7495140952

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.5%) to 74.352%

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Totals
Change from base Build 7464913947:	-0.5%
Covered Lines:	1013
Relevant Lines:	1234

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💛 - Coveralls

[YufengXin]

Please add yourself to the author block, to be blamed-:)

[sajith]

Please add yourself to the author block, to be blamed-:)

Got me. Was hoping to stay clear of responsibility. ;-)

[sajith]

@YufengXin This repository was set up such that new commits to PR branches will mark old approvals as stale. (I have changed it, although I'm of two minds about it.)

Could you please review this again?