Added SECURITY.md

Author: BreadEaterYT

SECURITY.md

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+## Security Policy
+
+### Supported Versions of JavaPHP
+
+|              Version         |         Supported         |
+| ---------------------------- | ------------------------- |
+| 2.0.x                        |    :heavy_check_mark:     |
+| beta-v1.1.0-production-ready |    :x:                    |
+| 1.0.0                        |    :x:                    |
+
+### Reporting a Vulnerability
+
+Open a Issue or send a mail to contact@breadeater.fr describing what vulnerability it is and where it is in the code and we'll review it and fix it