update version number for release v0.2.0

Author: github-merge

Diff for: setup.py

@@ -22,7 +22,7 @@
 
 setup(
     name="nnabla-browser",
-    version="0.1.0",
+    version="0.2.0",
     description="A browser base visualizer for Neural Network Libraries (nnabla).",
     url='https://github.com/sony/nnabla-browser',
     author="Akio Hayakawa",