Bump version to v1.19.0 (#123)

Releases the OrdinaryDiffEqDifferentiation v2 compat bump (PR #121) and
deprecation warning fixes (PR #122) that are already on master but were
not included in any registered version. This unblocks resolution of
OrdinaryDiffEq v6.108 / OrdinaryDiffEqRosenbrock v1.24.

Co-authored-by: ChrisRackauckas-Claude <accounts@chrisrackauckas.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: 3 people

Project.toml

@@ -1,7 +1,7 @@
 name = "MultiScaleArrays"
 uuid = "f9640e96-87f6-5992-9c3b-0743c6a49ffa"
 authors = ["Chris Rackauckas <accounts@chrisrackauckas.com>"]
-version = "1.18.0"
+version = "1.19.0"
 
 [deps]
 DiffEqBase = "2b5f629d-d688-5b77-993f-72d75c75574e"