Alacritty 0.10.0

Packaging:
New extra/alacritty-msg.man manpage for the alacritty msg subcommand
Minimum Rust version has been bumped to 1.53.0
Added:
Option colors.transparent_background_colors to allow applying opacity to all background colors
Support for running multiple windows from a single Alacritty instance (see docs/features.md)
Urgency support on Wayland via xdg_activation_v1
Changed:
ExpandSelection is now a configurable mouse binding action
Config option background_opacity, you should use window.opacity instead
Reload configuration files when their symbolic link is replaced
Strip trailing whitespaces when yanking from a block selection
Display area keeps history position when viewport is cleared
Commands spawn from the current directory of the foreground shell in Unix-like systems
Remove trailing newline from strings taken from hints or simple/semantic selections
Builtin font is now used for box drawing characters from U+2500 to U+259f
Logs now print the time since startup instead of the local time
Fixed:
Line indicator obstructing vi mode cursor when scrolled into history
Vi mode search starting in the line below the vi cursor
Invisible cursor with matching foreground/background colors
Crash when hovering over a match emptied by post-processing
Crash when the vi cursor is on the scrollback and viewport clear is invoked
Freeze when the vi cursor is on the scrollback and scrollback clear is invoked
Vi cursor on topmost of the display moving downward when scrolled into history with active output
Input lag on Wayland with Nvidia binary driver
Crash when hovering the mouse over fullwidth characters
Do not create logfile if the file already exists