* fix: Bulk update of valid upto field wasn't working
Check in dates for the price list was failing because valid_upto field was string. Converting to date fixed the problem.
* chore: extend fix and cleanup whitespace
Co-authored-by: Ankush Menat <ankush@frappe.io>
(cherry picked from commit 95a5ef1d416d54ecf0f557586b341b0dce2a0b05)
Co-authored-by: fatihustaoglu <46131068+fatihustaoglu@users.noreply.github.com>