set version to v2.5.1

ranocha · ranocha · commit 046745c088bb · 2021-10-01T12:49:57.000+02:00
diff --git a/Project.toml b/Project.toml
@@ -1,7 +1,7 @@
 name = "RootedTrees"
 uuid = "47965b36-3f3e-11e9-0dcf-4570dfd42a8c"
 authors = ["Hendrik Ranocha <mail@ranocha.de> and contributors"]
-version = "2.5.1-pre"
+version = "2.5.1"
 
 [deps]
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
