Updated "Tested up to" version to 6.2.

Author: ndiego

readme.txt

@@ -2,7 +2,7 @@
 Contributors:      ndiego, outermostdesign
 Tags:              icon, icon block, SVG, SVG block, block
 Requires at least: 6.0
-Tested up to:      6.1
+Tested up to:      6.2
 Requires PHP:      7.0
 Stable tag:        1.5.0
 License:           GPL-2.0-or-later