libxkbcommon: update to 1.3.1.

libxkbcommon 1.3.1 - 2021-09-10
==================

- In `xkbcli interactive-x11`, use the Esc keysym instead of the Esc keycode
  for quitting.

  Contributed by Simon Ser.

- In `xkbcli how-to-type`, add `--keysym` argugment for how to type a keysym
  instead of a Unicode codepoint.

- Fix a crash in `xkb_x11_keymap_new_from_device` error handling given some
  invalid keymaps. Regressed in 1.2.0.

  Reported by Zack Weinberg. Tested by Uli Schlachter.

(wiz)