bump Scala and sbt versions

Author: SethTisue

.travis.yml

@@ -6,8 +6,8 @@ language: scala
 
 scala:
   - 2.11.12
-  - 2.12.10
-  - 2.13.1
+  - 2.12.11
+  - 2.13.3
 
 env:
   - ADOPTOPENJDK=8
@@ -20,6 +20,5 @@ script: ./build.sh
 
 notifications:
   email:
-    - adriaan.moors@lightbend.com
     - seth.tisue@lightbend.com
     - andy@hicks.net

project/build.properties

@@ -1 +1 @@
-sbt.version=1.3.7
+sbt.version=1.3.13