Update info about WP supported version

Author: pitbulk

onelogin-saml-sso/readme.txt

@@ -2,7 +2,7 @@
 Contributors: onelogin
 Tags: sso, saml, single sign on, password, active directory, ldap, identity, onelogin, yubico, yubikey, vip access, otp
 Requires at least: 2.1.2
-Tested up to: 4.7.4
+Tested up to: 4.8
 Stable tag: trunk
 
 This plugin provides single sign-on via SAML and gives users one-click access to their WordPress accounts from identity providers like OneLogin.