Upgrade scalap to support sbt 1.3

smarter · smarter · commit 19db2f20275d · 2020-01-16T09:46:02.000+01:00
diff --git a/community-build/community-projects/scalap b/community-build/community-projects/scalap
@@ -1 +1 @@
-Subproject commit fe6239e99c07bf838e57fe0dc9930208a5486ad3
+Subproject commit a20c669b8f264a7b08cfccd875049420007deada
