Support Python 3.12

[haas-daniel]

Lssh throws the following errors in a python3.12 environment:

/usr/local/lib/lssh/hostlist.py:40: SyntaxWarning: invalid escape sequence '\s'
m = re.match('^\sHost\s+([\S]+)\s$', line, re.IGNORECASE)
/usr/local/lib/lssh/hostlist.py:48: SyntaxWarning: invalid escape sequence '\s'
m = re.match('^\sproxyjump\s+([\S]+)\s$', line, re.IGNORECASE)
/usr/local/lib/lssh/hostlist.py:51: SyntaxWarning: invalid escape sequence '\s'
m = re.match('^\s*#\slssh:(file)?keywords\s(.)$', line, re.IGNORECASE)
/usr/local/lib/lssh/hostlist.py:61: SyntaxWarning: invalid escape sequence '\s'
m = re.match('^\s*#\slssh:displayname\s+(\S.)$', line, re.IGNORECASE)
/usr/local/lib/lssh/hostlist.py:64: SyntaxWarning: invalid escape sequence '\s'
m = re.match('^\s*#\slssh:assignedcustomer\s+(\S.)$', line, re.IGNORECASE)
/usr/local/lib/lssh/config_validation.py:264: SyntaxWarning: invalid escape sequence '\S'
m = re.match('^(\s*)([a-zA-Z]+)(\s+)(\S.*)$', line)

[leitwerk-ag]

thx for your report! :)
can you please test https://github.com/leitwerk-ag/lssh/tree/dev-fix-3 ?

[haas-daniel]

This works. thx :)