security/py-google-auth: Update to 1.31.0

Changes:	https://github.com/googleapis/google-auth-library-python/releases
		https://github.com/googleapis/google-auth-library-python/blob/master/CHANGELOG.md

security/py-google-auth/Makefile

 # Created by: Po-Chuan Hsieh <sunpoet@FreeBSD.org>
 
 PORTNAME=	google-auth
-PORTVERSION=	1.30.2
+PORTVERSION=	1.31.0
 CATEGORIES=	security python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}

security/py-google-auth/distinfo

-TIMESTAMP = 1622214116
-SHA256 (google-auth-1.30.2.tar.gz) = 9b235dbc876e49454cbedc52ae0abd540ef705ebccdf4fbe93553bb13f26b1a4
-SIZE (google-auth-1.30.2.tar.gz) = 169368
+TIMESTAMP = 1624189753
+SHA256 (google-auth-1.31.0.tar.gz) = 154f7889c5d679a6f626f36adb12afbd4dbb0a9a04ec575d989d6ba79c4fd65e
+SIZE (google-auth-1.31.0.tar.gz) = 170970