Git commits in Moodle 3.9.0 by carlos

commit 32591786d9e1057e2e1cc5301ef676f7d18b6655
Author: carlos <cvmcosta@yahoo.com.br>
Date:   Fri, 03 Apr 2020 22:42:53 +0800
Tag:    v3.9.0-beta

MDL-66920 mod_lti: Allow usage of both JWKS URI and Public Key

commit a2a13f2786aabba56eaabfeb8dd0060ffaf4f393
Author: carlos <cvmcosta@yahoo.com.br>
Date:   Sat, 22 Feb 2020 22:18:38 +0800
Tag:    v3.9.0-beta

MDL-66920 lib/php-jwt: Update to version 5.2.0 to add JWK support