Revision 543891

MFH: r543817

games/py-mnemosyne: Take Maintainer'ship, fix runtime error and add missing dependencies

Latest version of games/py-mnemosyne requires new dependencies. This commit adds the missing dependencies:

 - audio/py-gtts
 - security/py-gtts-token (required by audio/py-gtts)
 - textproc/py-googletrans

The games/py-mnemosyne port needs to be limited to Python 3.7+ to keep the dependency chains intact. This is because textproc/py-googletrans depends on www/py-httpx which is only for Python 3.7+.

PR:		247595
Submitted by:	kai
Reported by:	gspurki@gmail.com
Approved by:	tcberner (mentor)
Differential Revision:	https://reviews.freebsd.org/D25895

Approved by:	ports-secteam (joneum)