Update requirements for pyton 3.9

requirements.txt

@@ -1,13 +1,9 @@
-astroid==2.4.2
+cffi==1.14.5
-isort==5.7.0
+cryptography==3.4.7
-lazy-object-proxy==1.4.3
+logzero==1.7.0
-logzero==1.6.3
+pycparser==2.20
-mccabe==0.6.1
-pylint==2.6.0
 python-yubico==1.3.3
 pyudev==0.22.0
-pyusb==1.1.0
+pyusb==1.1.1
-six==1.15.0
+requests==1.1.0
-toml==0.10.2
+six==1.16.0
-typed-ast==1.4.2
-wrapt==1.12.1