chore(release): prepare for next development iteration

Author: bednar

src/InfluxDB2/Client.php

@@ -18,7 +18,7 @@ class Client
     /**
      * Client version updated by: 'make release VERSION=1.5.0'
      */
-    const VERSION = '3.1.0';
+    const VERSION = 'dev';
 
     public $options;
     public $closed = false;