Set stable tag

Author: Benjamin Pick

readme.txt

@@ -4,7 +4,7 @@ Tags: geolocation, locator, geoip, maxmind, ipstack
 Requires at least: 5.0
 Tested up to: 6.8
 Requires PHP: 7.2.5
-Stable tag: 5.5.0
+Stable tag: 5.6.1
 License: GPLv3 or later
 License URI: http://www.gnu.org/licenses/gpl-3.0.html
 Donate link: https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=BSYUZHS8FH3CL