editors/micro: Update to 2.0.7

Changes:

Keybindings improvements
- Key sequences can be bound with <Key1><Key2>..., for example
  <Ctrl-x><Ctrl-c>.
- Different keybindings for buffers, command bar, and terminal panes
  can be specified.
  - See > help keybindings for the details and defaults.
- Better support for complex keybindings.
  - Function keys with modifiers.
  - PgUp, PgDown, Delete... with modifiers.

Clipboard
- Support for multiple cursors (internal clipboards for each cursor).
- Support for OSC52 (copy and paste via your terminal, which works over
  ssh).
  - New clipboard option (default external).
    - Set to internal for internal clipboard only.
    - Set to external for xclip/xsel external clipboard.
    - Set to terminal to use OSC52.
      - Known to work in iTerm2, kitty, xterm, st, rxvt-unicode.
      - See > help copypaste for details on enabling support in your
        terminal.
- 24-bit color support on Windows (make sure to set MICRO_TRUECOLOR=1)
  - Doesn't work with ConEmu but works with Windows-terminal, command
    prompt...

Minor changes
- Better support for obscure terminals (reading terminfo dynamically
  without relying on infocmp).
- Better truecolor detection.
- No duplicates in up-arrow history.
- Graceful exit when receiving SIGTERM.

Bug fixes
- Fix path escaping on Windows.
- Fix issue when fastdirty is off
- Syntax highlighting and linting fixes

(sjmulder)