travis.yml: Install Python v3.6.3

KVGarg · KVGarg · commit dc36c9f10ab1 · 2019-08-04T23:15:51.000+05:30
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,5 @@
 language: python
-python: 3.6
+python: 3.6.3
 
 cache:
   pip: true
