Commoncode

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- Switch back from calver to semver.
- Adopt latest skeleton. The default virtualenv directory is now venv and no
longer tmp
- Fix issue with Click progressbar API 23 that prohibited to use all supported
Click versions. Since Click is widely used that was a frequent source of
installation conflicts.

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- Add an attribute to the header for scancode output format versioning.
This is for https://github.com/nexB/scancode-toolkit/issues/2653

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- Ensure that the progressbar displays a counter correctly.
This is a fix for https://github.com/nexB/scancode-toolkit/issues/2583

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- Add preserve_spaces argument in commoncode.paths.portable_filename.
This argument will prevent the replacement of spaces in filenames.

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- Do not fail if a Codebase does not have a common shared root 23
- Consider all Resource attributes when building a VirtualCodebase 23
- Do not ignore by default sccs and rcs dirs https://github.com/nexB/scancode-toolkit/issues/1422

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- Do not fail if a Codebase file.size is None and not zero
- Bump pinned dependencies including pkg:pypi/urllib3 for CVE-2021-33503