fix: revert object().concat to depp-merge behavior reverting this change: https://github.com/jquense/yup/pull/1541/files#diff-48beee939efb52513592b4eec6486a4e55244a1a990e79fdef0cacbbd45f3e02L327
fix: revert object().concat to depp-merge behavior reverting this change: https://github.com/jquense/yup/pull/1541/files#diff-48beee939efb52513592b4eec6486a4e55244a1a990e79fdef0cacbbd45f3e02L327