add ability to define jar manifest (#634)

* add capability to define jar manifest

* Don't use the custom manifest for doc-only jars

This is to pass test mill.scalalib.HelloWorldTests.scalaDocOptions

* Add JarManifest.Default and fix the build


rebase fix

1 files changed, 1 insertions, 0 deletions

diff --git a/build.sc b/build.sc
index cba26933..2515abda 100755
--- a/build.sc
+++ b/build.sc
@@ -8,6 +8,7 @@ import mill._
 import mill.scalalib._
 import publish._
 import mill.modules.Jvm.createAssembly
+
 trait MillPublishModule extends PublishModule{
 
   def artifactName = "mill-" + super.artifactName()