add link to Perl implementation JSON::Schema::Draft201909

Author: karenetheridge

_data/validator-libraries-modern.yml

@@ -136,6 +136,11 @@
       date-draft:
       draft: [7, 6, 4]
       license: "The Artistic License 2.0 (GPL Compatible)"
+    - name: JSON::Schema::Draft201909
+      url: https://github.com/karenetheridge/JSON-Schema-Draft201909
+      notes:
+      date-draft: [2019-09]
+      license: "GNU General Public License, Version 1 + The Artistic License 1.0"
 - name: PHP
   implementations:
     - name: Opis Json Schema