[ci skip] Mark the start of 3.1.10 development
diff --git a/system/core/CodeIgniter.php b/system/core/CodeIgniter.php
index 7b1dcc2..b4e41c8 100644
--- a/system/core/CodeIgniter.php
+++ b/system/core/CodeIgniter.php
@@ -55,7 +55,7 @@
  * @var	string
  *
  */
-	const CI_VERSION = '3.1.9';
+	const CI_VERSION = '3.1.10-dev';
 
 /*
  * ------------------------------------------------------