- Update to 0.21.1:
* Fix a regression in the previous release that could cause a
crash when changing layouts and mousing (#3713)

- Update to 0.21.0:
* Allow reloading the kitty.conf config file by pressing
ctrl+shift+f5. (#1292)
* Allow clicking URLs to open them without needing to also hold
ctrl+shift
* Allow remapping all mouse button press/release events to
perform arbitrary actions. See details.
* Support infinite length ligatures (#3504)
* Backward incompatibility: The options to control which
modifiers keys to press for various mouse actions have been
removed, if you used these options, you will need to replace
them with configuration using the new mouse actions framework
as they will be ignored. The options were: terminal_select_modifiers,
rectangle_select_modifiers and open_url_modifiers.
* Add a configurable mouse action (ctrl+alt+triplepress to select
from the clicked point to the end of the line. (#3585)
* Add the ability to un-scroll the screen to the kitty @
scroll-window remote control command (#3604)
* A new option, tab_bar_margin_height to add margins around
the top and bottom edges of the tab bar (#3247)
* Unicode input kitten: Fix a regression in 0.20.0 that broke
keyboard handling when the NumLock or CapsLock modifiers were engaged. (#3587)
* Fix a regression in 0.20.0 that sent incorrect bytes for the
F1-F4 keys in rmkx mode (#3586)
* Add a few more special commandline arguments for the launch command.
Now all KITTY_PIPE_DATA is also available via command line argument