Merge pull request #55 from ThoughtWorksInc/Atry-patch-2

Upgrade Scala versions

Author: Atry

.travis.yml

@@ -8,10 +8,10 @@ addons:
 language: scala
 
 scala:
-  - "2.10.7"
-  - "2.11.12"
-  - "2.12.6"
-  - "2.13.0"
+  - 2.10.7
+  - 2.11.12
+  - 2.12.11
+  - 2.13.2
 
 jdk:
   - openjdk8