Update the version in setup.py for the next release (#158)

Author: curquiza

setup.py

@@ -8,7 +8,7 @@
         "requests"
     ],
     name="meilisearch",
-    version="0.12.3",
+    version="0.12.4",
     author="Charlotte Vermandel",
     author_email="[email protected]",
     description="The python client for MeiliSearch API.",