Version Bump to 1.4.21

Author: tatarize

setup.py

@@ -5,7 +5,7 @@
 
 setuptools.setup(
     name="pyembroidery",
-    version="1.4.20",
+    version="1.4.21",
     author="Tatarize",
     author_email="[email protected]",
     description="Embroidery IO library",