Merge branch 'enhancement/relicensing' into 'master'

Change license to Apache 2.0.

See merge request !31
4 jobs for v0.18.0 in 4 minutes and 5 seconds (queued for 2 minutes and 49 seconds)
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Status Name Job ID Coverage
  Test
passed test_py_tools_ds #94622

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70.0%
passed test_styles #94623

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passed test_urls #94624

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  Deploy Pypi
passed deploy_pypi #94625

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