Bump minimum versions

Author: Ned Zimmerman

README.md

@@ -2,8 +2,8 @@
 **Contributors:** conner_bw, greatislander  
 **Donate link:** https://opencollective.com/pressbooks/  
 **Tags:** pressbooks, sso, cas  
-**Requires at least:** 4.9.7  
-**Tested up to:** 4.9.7  
+**Requires at least:** 4.9.8  
+**Tested up to:** 4.9.8  
 **Stable tag:** 1.1.0  
 **License:** GPLv3 or later  
 **License URI:** https://www.gnu.org/licenses/gpl-3.0.html  

pressbooks-cas-sso.php

@@ -7,7 +7,7 @@
 Author: Pressbooks (Book Oven Inc.)
 Author URI: https://pressbooks.org
 Requires PHP: 7.1
-Pressbooks tested up to: 5.4.3
+Pressbooks tested up to: 5.5.0
 Text Domain: pressbooks-cas-sso
 License: GPL v3 or later
 Network: True

readme.txt

@@ -2,8 +2,8 @@
 Contributors: conner_bw, greatislander
 Donate link: https://opencollective.com/pressbooks/
 Tags: pressbooks, sso, cas
-Requires at least: 4.9.7
-Tested up to: 4.9.7
+Requires at least: 4.9.8
+Tested up to: 4.9.8
 Stable tag: 1.1.0
 License: GPLv3 or later
 License URI: https://www.gnu.org/licenses/gpl-3.0.html