Update soda-sql-spark version (#88)

Author: vijaykiran

setup.cfg

@@ -19,7 +19,7 @@ project_urls =
 packages = find:
 package_dir = =src
 install_requires =
-    soda-sql-spark==2.1.0b17
+    soda-sql-spark==2.1.0b20
     pyspark>=3.0.0,<4.0.0
 python_requires = >=3.6