Bump version to 3.3.1

- Add new exception InvalidRedirectURI to separate invalid-uri from
  invalid-request error cases. When the redirect-uri is invalid no
  error-url can be crafted.

Signed-off-by: Ivan Kanakarakis <ivan.kanak@gmail.com>

Author: c00kiemon5ter

setup.py

@@ -2,7 +2,7 @@
 
 setup(
     name='pyop',
-    version='3.3.0',
+    version='3.3.1',
     packages=find_packages('src'),
     package_dir={'': 'src'},
     url='https://github.com/IdentityPython/pyop',