256 bit encryption for EncryptedFile

It looks like the encryption level for rails:credentials is 128bits and cannot be overridden?

https://github.com/rails/rails/pull/30067/files#diff-a9f0886d363d08b4bb483324f68f676be9a9079f599695db37a967773d95e40a

Has allowing the cipher to be parameterized been discussed before?

Relevant discussion of 128 vs 256