Bump version to v0.2.1

Author: sile

setup.py

@@ -11,7 +11,7 @@ def get_long_description() -> str:
 
 setup(
     name="kurobako",
-    version="0.2.0",
+    version="0.2.1",
     description="A Python library to help implementing kurobako's solvers and problems",
     long_description=get_long_description(),
     long_description_content_type="text/markdown",