Add support for python3.10

Add support for python3.10

state_pattern() returns NoAttr value instead of None in dictionnary v…

…alues

add separators argument to parse_smart()

add key_filter argument to parse_smart()

add key_filter argument to parse_smart()

2to3 : Working on base.py

2to3 : Working on base.py

debug again readthdocs.org issue

Change python-textops to python-textops3