bump version number for OptimizationBase

this is for changing the order of the fields in the OptimizationCache

Author: SebastianM-C

lib/OptimizationBase/Project.toml

@@ -1,7 +1,7 @@
 name = "OptimizationBase"
 uuid = "bca83a33-5cc9-4baa-983d-23429ab6bcbb"
 authors = ["Vaibhav Dixit <[email protected]> and contributors"]
-version = "3.3.1"
+version = "4.0.0"
 
 [deps]
 ADTypes = "47edcb42-4c32-4615-8424-f2b9edc5f35b"