Bump tested up to version to 7.0

Author: phpbits

readme.txt

@@ -1,7 +1,7 @@
 === Simple Podcasting ===
 Contributors: 10up, helen, adamsilverstein, jakemgold, jeffpaul, cadic
 Tags:         podcasting, podcast, apple podcasts, episode, season
-Tested up to: 6.9
+Tested up to: 7.0
 Stable tag:   1.9.1
 License:      GPLv2 or later
 License URI:  http://www.gnu.org/licenses/gpl-2.0.html