update setup.py v0.4.0

Author: jaybdub

setup.py

@@ -51,7 +51,7 @@ def trt_lib_dir():
 
 setup(
     name='torch2trt',
-    version='0.3.0',
+    version='0.4.0',
     description='An easy to use PyTorch to TensorRT converter',
     packages=find_packages(exclude=exclude_dir),
     ext_package='torch2trt',