In this version:
-ended support for PHP 7.0 & 7.1 (#85 )
-IssueInstant and NotBefore format checks (#79)
-added Missing checks for Assertion (#80 & #81 )
-XML namespaces are not hardcoded anymore (#74 )
-RequestedAuthnContext's Comparison attribute is now dynamic (#84 , #94 )
-logout's request/response redirect binding is now correctly retrieved (#90 )
-various improvements (#78 , #92 , #95 , #97 )