python-pillow: Update to 7.2.0 and backport some fixes

Backports from https://github.com/python-pillow/Pillow/pull/4890

Fixes #7136

mingw-w64-python-pillow/003-remove-hardcoded-include-path.patch

@@ -0,0 +1,27 @@
+From 3b38eb317bc9f6ed409accb174d1fb52af8aea8b Mon Sep 17 00:00:00 2001
+From: nulano <nulano@nulano.eu>
+Date: Sun, 30 Aug 2020 00:57:27 +0200
+Subject: [PATCH] remove legacy include directory for libimagequant
+
+1) it is hardcoded to 32-bit C:\msys64\mingw32
+2) current library version uses \mingw64\include\libimagequant.h directly
+---
+ setup.py | 5 -----
+ 1 file changed, 5 deletions(-)
+
+diff --git a/setup.py b/setup.py
+index cf39162502..528a3a0448 100755
+--- a/setup.py
++++ b/setup.py
+@@ -528,11 +528,6 @@ def build_extensions(self):
+             _add_directory(library_dirs, "/lib")
+ 
+         if sys.platform == "win32":
+-            if PLATFORM_MINGW:
+-                _add_directory(
+-                    include_dirs, "C:\\msys64\\mingw32\\include\\libimagequant"
+-                )
+-
+             # on Windows, look for the OpenJPEG libraries in the location that
+             # the official installer puts them
+             program_files = os.environ.get("ProgramFiles", "")