v5.13.1

Bug Fix 🐞

• Fix IE11 errors and polyfill fixes #1255 (@shaal @JosefBredereck)
• WIP: improvement(docs): added iframes for the pages #1172 #1222 (@mfranzke @JosefBredereck)

QOL 🎈

• Remove last traces of installplugin from core package #1254 (@ringods)

Contribution Changes 🙁

• chore(repo): retires Brian from active involvement #1250 (@bmuenzenmeyer @sghoweri)

Authors: 6

• Brian Muenzenmeyer (@bmuenzenmeyer)
• Josef Bredreck (@JosefBredereck)
• Maximilian Franzke (@mfranzke)
• Ofer Shaal (@shaal)
• Ringo De Smet (@ringods)
• Salem Ghoweri (@sghoweri)