It allows you to easily integrate external source for diff count.
If user has some other plugin keeping track of diff counts. There's
no reason for lualine to make same calculations again . It can just
reuse them. But lualine knows nothing about how other plugin exposes
their api so user will have to glue them together with this option.
* Refactor highlight restoring after ColorScheme
Previously custom highlights/ component highlights had to call
expand_set_theme to make them restored . That's unintuative . Now any
highlight created by lualine.highlight.highlight() will be restored :)
* Renamed component -> var_name | Proper BugFix
Sometimes async process outputs partial data. Previously that data was
processed imediatly causing wrong results. Now the data is processed
after async processes finishes