add news and bump version

Author: vchuravy

NEWS.md

@@ -5,6 +5,17 @@ Trixi.jl follows the interpretation of
 used in the Julia ecosystem. Notable changes will be documented in this file
 for human readability.
 
+
+## Changes when updating to v0.13 from v0.12.x
+
+#### Changed
+
+- The `polyester` preference got merged with the `native_threading` preference and the `Trixi.set_polyester` function got renamed to `Trixi.set_threading_backend` ([#2476]).
+
+#### Deprecated
+
+#### Removed
+
 ## Changes in the v0.12 lifecycle
 
 #### Added

Project.toml

@@ -1,7 +1,7 @@
 name = "Trixi"
 uuid = "a7f1ee26-1774-49b1-8366-f1abc58fbfcb"
 authors = ["Michael Schlottke-Lakemper <[email protected]>", "Gregor Gassner <[email protected]>", "Hendrik Ranocha <[email protected]>", "Andrew R. Winters <[email protected]>", "Jesse Chan <[email protected]>", "Andrés Rueda-Ramírez <[email protected]>"]
-version = "0.12.8-DEV"
+version = "0.13.0-DEV"
 
 [deps]
 Accessors = "7d9f7c33-5ae7-4f3b-8dc6-eff91059b697"