emulators/{catapult,openmsx}: update to 18.0

ChangeLog:
https://raw.githubusercontent.com/openMSX/openMSX/RELEASE_18_0/doc/release-notes.txt

PR: 264702
Reported by: dmenelkir@gmail.com
MFH: 2022Q2 (bugfix release)

(cherry picked from commit 9a977dacf7c5cfb34907170d78327cc6deb41e69)