ENH: Free threading changes for FSEvents

MANIFEST.in

@@ -4,6 +4,8 @@ include LICENSE
 include COPYING
 include AUTHORS
 recursive-include src *.py *.h *.c
+include src/watchdog_fsevents.c
+include src/pythoncapi_compat.h
 include src/watchdog/py.typed
 include tox.ini
 include docs/*.txt

setup.py

@@ -30,6 +30,7 @@
             sources=[
                 "src/watchdog_fsevents.c",
             ],
+            include_dirs=[SRC_DIR],
             libraries=["m"],
             define_macros=[
                 ("WATCHDOG_VERSION_STRING", '"' + version.VERSION_STRING + '"'),