Start v0.6 release notes

[ci skip]

NEWS.md

@@ -1,3 +1,28 @@
+Julia v0.6.0 Release Notes
+==========================
+
+New language features
+---------------------
+
+Language changes
+----------------
+
+Breaking changes
+----------------
+
+This section lists changes that do not have deprecation warnings.
+
+ * Operations between `Float16` and `Integers` now return `Float16` instead of `Float32`. ([#17261])
+
+Library improvements
+--------------------
+
+Compiler/Runtime improvements
+-----------------------------
+
+Deprecated or removed
+---------------------
+
 Julia v0.5.0 Release Notes
 ==========================
 
@@ -160,8 +185,6 @@ This section lists changes that do not have deprecation warnings.
  * `map` on a dictionary now expects a function that expects and returns a `Pair`.
  The result is now another dictionary instead of an array ([#16622]).
 
- * Operations between `Float16` and `Integers` now return `Float16` instead of `Float32`. ([#17261])
-
 Library improvements
 --------------------