Issue #3406306 by hoanns, jcnventura, anneke_vde: Warning: Undefined array key...

Issue #3406306 by hoanns, jcnventura, anneke_vde: Warning: Undefined array key "url" in Drupal\Core\Asset\JsCollectionOptimizerLazy->optimizeGroup()


(cherry picked from commit 8030ba94)

eea2c305 #3406306 Add license url
d69268ee Change gpl compatible to true

single_datetime.libraries.yml

@@ -2,7 +2,8 @@ datetimepicker:
   remote: https://github.com/xdan/datetimepicker
   license:
     name: MIT
-    gpl-compatible: false
+    url: https://github.com/xdan/datetimepicker/blob/master/MIT-LICENSE.txt
+    gpl-compatible: true
   js:
     /libraries/jquery-datetimepicker/build/jquery.datetimepicker.full.js: {}
     js/drupal.single_datetime.js: {}