Remove paramiko upper-bound

Remove paramiko upper-bound to allow using paramiko version >3.0.

Author: gboutry

setup.py

@@ -28,7 +28,7 @@
         'websockets>=8.1,<9.0 ; python_version=="3.8"',
         'websockets>=9.0,<10.0 ; python_version=="3.9"',
         'websockets>=10.0; python_version>"3.9"',
-        'paramiko>=2.4.0,<3.0.0',
+        'paramiko>=2.4.0',
         'pyasn1>=0.4.4',
         'toposort>=1.5,<2',
         'typing_inspect>=0.6.0',