Googlevoice

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No significant changes.

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Refreshed project metadata. Cleaned up lint.

Requires Python 3.7 or later.

Login is still non-functional.

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Refreshed project metadata. Now requires Python 3.6 or later.
Login still basically is non-functional.

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* 3: Fixed error in Delete message.

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* pettazz/pygooglevoice10: Fix typo in ``googlevoice`` command.

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* pettazz/pygooglevoice4: Removed multiple checks for sha-1
hash, which failed in some cases when the Message IDs
weren't of that form.