Add notes about Project.settings enhancements.

notes/0.13.8/define-project-settings-with-settings-definition.markdown

@@ -0,0 +1,32 @@
+  [@dwijnand]: https://github.com/dwijnand
+  [1902]: https://github.com/sbt/sbt/pull/1902
+
+### Fixes with compatibility implications
+
+### Improvements
+
+- Facilitate nicer ways of declaring project settings. See below. [#1902][1902] by [@dwijnand][@dwijnand]
+
+### Bug fixes
+
+### Nicer ways of declaring project settings
+
+Now a `Seq[Setting[_]]` can be passed to `Project.settings` without the needs for "varargs expansion", ie. `: _*`
+
+Instead of:
+
+    lazy val foo = project settings (sharedSettings: _*)
+
+It is now possible to do:
+
+    lazy val foo = project settings sharedSettings
+
+Also, `Seq[Setting[_]]` can be declared at the same level as individual settings in `Project.settings`, for instance:
+
+    lazy val foo = project settings (
+      sharedSettings,
+      version := "1.0",
+      someMoreSettings
+    )
+
+[#1902][1902] by [@dwijnand][@dwijnand]