bump version to 0.2.254

Author: mofeing

Project.toml

@@ -1,6 +1,6 @@
 name = "Reactant"
 uuid = "3c362404-f566-11ee-1572-e11a4b42c853"
-version = "0.2.253"
+version = "0.2.254"
 authors = ["William Moses <wmoses@mit.edu>", "Valentin Churavy <vchuravy@mit.edu>", "Sergio Sánchez Ramírez <sergio.sanchez.ramirez@bsc.es>", "Paul Berg <paul@plutojl.org>", "Avik Pal <avikpal@mit.edu>", "Mosè Giordano <mose@gnu.org>"]
 
 [workspace]