Support optional NameID element in SAML response

Prior to pysaml2 v4.6.1 an exception is thrown when parsing a SAML
response with no NameID element.

  satosa.exception.SATOSAAuthenticationError: Failed to parse authn request

pysaml2 v4.6.1 onwards supports SAML responses with no NameID element.

Signed-off-by: Ivan Kanakarakis <[email protected]>

Author: c00kiemon5ter

setup.py

@@ -16,7 +16,7 @@
     package_dir={'': 'src'},
     install_requires=[
         "pyop",
-        "pysaml2==4.5.0",
+        "pysaml2>=4.6.1",
         "pycryptodomex",
         "requests",
         "PyYAML",