Bump to v0.17.3

Bump to v0.17.3 to include Elastix 2023-07-19

xref 42672e34fa34a1c7296d3a7ad9d06cd6c22a00b

Author: tbirdso

setup.py

@@ -18,7 +18,7 @@
 
 setup(
     name=package_name,
-    version='0.17.2',
+    version='0.17.3',
     author='Insight Software Consortium',
     author_email='itk+community@discourse.itk.org',
     packages=['itk'],