Python only: Reset a flag in SF_Database.DMin and DMax methods to allow dates to be returned. Review typing hints to accept strings and dates Integration of remarks from Microsoft/VSCode about minor syntax issues in scriptforge.pyi (syntax was accepted by PyCharm). Now, syntax commonly accepted by both IDE's. Change-Id: I752d9f1d7a5293222d81748f8fb2e8f46f4317de Reviewed-on: https://gerrit.libreoffice.org/c/core/+/172912 Reviewed-by: Jean-Pierre Ledure <jp@ledure.be> Tested-by: Jenkins