Upgrade sbt to 1.3.6

The crosbuild issue is fixed now (https://github.com/sbt/sbt/issues/5336),
this is related to 3cdf9d6fSigned-off-by: 35V LG84 <35vlg84-x4e6b92@e257.fi>

CHANGELOG.adoc

@@ -33,7 +33,7 @@ Updated deps and tools:
  ** scala-collection-compat: 2.1.3
  ** scallop: 3.3.2
  * Build
- ** sbt: 1.3.5
+ ** sbt: 1.3.6
  ** sbt-scalajs: 0.6.31
  ** sbt-scoverage: 1.6.1
  ** sbt-sonatype: 3.8.1

project/build.properties

-sbt.version=1.3.4
+sbt.version=1.3.6