security/py-asyncssh: Update to 2.9.0

Changes:	https://github.com/ronf/asyncssh/blob/master/docs/changes.rst

security/py-asyncssh/Makefile

 PORTNAME=	asyncssh
-PORTVERSION=	2.8.1
+PORTVERSION=	2.9.0
 CATEGORIES=	security python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
@@ -10,7 +10,8 @@ COMMENT=	Asynchronous SSHv2 client and server library
 LICENSE=	EPL
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
-RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}cryptography>=2.8:security/py-cryptography@${PY_FLAVOR}
+RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}cryptography>=2.8:security/py-cryptography@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}typing-extensions>=3.6:devel/py-typing-extensions@${PY_FLAVOR}
 
 USES=		cpe python:3.6+
 USE_PYTHON=	autoplist concurrent distutils

security/py-asyncssh/distinfo

-TIMESTAMP = 1637073018
-SHA256 (asyncssh-2.8.1.tar.gz) = 0648eba58d72653755f28e26c9bd83147d9652c1f2f5e87fbf5a87d7f8fbf83a
-SIZE (asyncssh-2.8.1.tar.gz) = 424719
+TIMESTAMP = 1643133793
+SHA256 (asyncssh-2.9.0.tar.gz) = 3cc337d806619465455bf187e8a91e3f575423718184e238f9ae8c41c4f33af1
+SIZE (asyncssh-2.9.0.tar.gz) = 477142