Merge pull request #1054 from scala-steward/update/sbt-1.6.0

Update sbt to 1.6.0

Author: fthomas

.github/workflows/ci.yml

@@ -81,7 +81,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [2.12.14]
+        scala: [2.12.15]
         java: [adopt-hotspot@8]
     runs-on: ${{ matrix.os }}
     steps:

project/build.properties

@@ -1,2 +1,2 @@
-sbt.version=1.5.8
+sbt.version=1.6.0