Update libtcod.

Author: HexDecimal

CHANGELOG.rst

@@ -11,6 +11,14 @@ Unreleased
 Added
  - Added package-level PyInstaller hook.
 
+Changed
+ - Using `libtcod 1.16.7`.
+
+Fixed
+ - Fixed crashes from loading tilesets with non-square tile sizes.
+ - Tilesets with a size of 0 should no longer crash when used.
+ - Prevent division by zero from recommended-console-size functions.
+
 12.0.0 - 2021-03-05
 -------------------
 Deprecated

build_libtcod.py

@@ -186,7 +186,7 @@ def unpack_sdl2(version: str) -> str:
 includes = parse_includes()
 
 module_name = "tcod._libtcod"
-include_dirs = [".", "libtcod/src/vendor/", "libtcod/src/vendor/zlib/"]
+include_dirs = [".", "libtcod/src/vendor/", "libtcod/src/vendor/utf8proc", "libtcod/src/vendor/zlib/"]
 
 extra_parse_args = []
 extra_compile_args = []