Bump sbt to 1.1.6

smarter · smarter · commit 55266659af13 · 2018-07-07T08:02:37.000+02:00
1.1.5 is technically supported but we shouldn't use that in the default
template since it has known bugs fixed in 1.1.6.
diff --git a/README.md b/README.md
@@ -32,7 +32,7 @@ addSbtPlugin("ch.epfl.lamp" % "sbt-dotty" % "0.2.2")
 
 ### project/build.properties
 ```scala
-sbt.version=1.1.5
+sbt.version=1.1.6
 ```
 
 Older versions of sbt are not supported.
diff --git a/project/build.properties b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.1.5
+sbt.version=1.1.6
