Bump version number to v0.6.3

Author: RedFantom

setup.py

@@ -179,7 +179,7 @@ def copy_to_target(self, target: str):
 
 setup(
     name="tkextrafont",
-    version="v0.6.2",
+    version="v0.6.3",
     packages=["tkextrafont"],
     description="Fonts loader for Tkinter",
     author="The extrafont and tkextrafont authors",