Bump version.

Author: elongl

setup.py

@@ -11,7 +11,7 @@
 setup(
     name="elementary-data",
     description="Data monitoring and lineage",
-    version="0.6.3",
+    version="0.6.4",
     packages=find_packages(),
     include_package_data=True,
     python_requires=">=3.6.2",