move to 0.4.0

need pytorch >= 1..8.0

Author: kashif

setup.py

@@ -2,7 +2,7 @@
 
 setup(
     name="pytorchts",
-    version="0.3.1",
+    version="0.4.0",
     description="PyTorch Probabilistic Time Series Modeling framework",
     long_description=open("README.md").read(),
     long_description_content_type="text/markdown",