Version 4.7.0
Fix bug with checking state value on LTI 1.3 messages
Add support for groups to belong to more than one groupset (so set element of a group may now be an array of strings rather than just a string)
Correct value of iss claim in client_assertion JWT when requesting an access token
Add option to allow use of HTTP GET for LTI 1.3 authentication requests
Improve mapping between JWT claims and OAuth1 message parameters (uses "lti1p1_" prefix for any "https://purl.imsglobal.org/spec/lti/claim/lti1p1" claims; added "target_link_uri" and "unmapped_claims" parameters)