Bump phoenixdb version to 1.2.1.dev0 after release
diff --git a/python-phoenixdb/setup.py b/python-phoenixdb/setup.py
index 0e60553..9bd59f5 100644
--- a/python-phoenixdb/setup.py
+++ b/python-phoenixdb/setup.py
@@ -59,7 +59,7 @@
         'Sphinx;python_version>="3.6"',
     ],
 
-version = "1.2.0"
+version = "1.2.1.dev0"
 
 setup(
     name="phoenixdb",