test: fix the failure test case (#26)

Author: sunisdown

README.md

@@ -102,7 +102,7 @@ Whenever rust code changes (your changes or via `git pull`):
 
 ```bash
 # make sure you activate the venv using "source venv/bin/activate" first
-maturin develop python -m pytest 
+maturin develop; python -m pytest 
 ```
 
 ## Testing

datafusion_ray/tests/test_context.py

@@ -19,6 +19,6 @@
 from datafusion_ray import Context
 
 def test():
-    ctx = Context(1, False)
+    ctx = Context(1)
     ctx.register_csv('tips', 'examples/tips.csv', True)
     ctx.plan("SELECT * FROM tips")