devel/py-glob2: Update to 0.7

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Summary

Proposed commit log message:

devel/py-glob2: Update to 0.7

Changelog:

    https://github.com/miracle2k/python-glob2/compare/0.6...v0.7

Reviewed_by: koobs
Approved by: koobs (ports, mentor)
Differential_Revision: D23425

Test Plan

• portlint: OK (looks fine.)
• testport: OK (poudriere: 1300069, [armv7, aarch64], 'BUILD_ALL_PYTHON_FLAVORS=1', [py27, py35, py36, py37, py38] tested)
• unittest: OK (

Python2.7 on armv7: 13 passed in 1.06 seconds
Python3.5 on armv7: 13 passed in 0.99 seconds
Python3.6 on armv7: 13 passed, 1 warnings in 1.00 seconds
Python3.7 on armv7: 13 passed, 1 warnings in 0.93 seconds
Python3.8 on armv7: 13 passed, 1 warnings in 1.20 seconds
)

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Thanks, @koobs.