textproc/py-jsx-lexer: Update to 1.0.0

• Switch back to PyPI as sdists are there available again.

• Modernize "do-test" target while I'm here.

Changelog:

https://github.com/fcurella/jsx-lexer/compare/v0.0.7...v1.0.0

PR: 262060
Approved by: koobs (maintainer, implicit: MAINTAINER_POLICY)
MFH: No (not compatible with py-pygments in 2022Q1)