Update version to v0.3.8

Author: Yasas

setup.py

@@ -10,7 +10,7 @@
 
 setuptools.setup(
     name="textflow",
-    version="0.3.7",
+    version="0.3.8",
     author="Yasas Senarath",
     author_email="[email protected]",
     description="Simple and extensible framework for end to end text based natural language understanding.",