Fix typo in PATH filter
Move some functions to powerline.lib.dict

Moved functions: `merge*` from `powerline.lib` and `mergeargs` from 
`powerline.commands.main`.
Fix zpython overrides
Add `powerline-reload-config` command
Remove inconsistent ShellPowerline.theme_option attribute

Other overrides are accessed via ShellPowerline.args.
Add support for modes to zpython bindings
Add support for testing zsh with zpython bindings
Update bot-ci commit
Update deps commit