ENH: Set Python package version to 2.2.0

Per discussion, bumping the minor version from 2.1.0 with the update to ITK 5.4.0.

Author: thewtex

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "scikit_build_core.build"
 
 [project]
 name = "itk-splitcomponents"
-version = "3.0.0"
+version = "2.2.0"
 description = "ITK filters to split a multi-component pixel image into component-wise scalar images"
 readme = "README.rst"
 license = {file = "LICENSE"}