Always install update-to-date python

Use the python3 the meta package.

Python 3.8 has reached EoL ("active support"): https://endoflife.date/python

Close #38

openbsd/scripts/postinstall.sh

@@ -12,7 +12,7 @@ pkg_add sudo--
 echo "vagrant ALL=(ALL) NOPASSWD: SETENV: ALL" >> /etc/sudoers
 
 # ansible support
-pkg_add -z "python%3.8"
+pkg_add "python3"
 
 # ensure consistent resolvable hostname
 hostname=$(hostname -s)