🚀 RELEASE: v0.6.1

[violoncelloCH]

please review @nextcloud/user_external

Changes (since v0.6.0):

• [X] #55 👌 IMPROVE: change the documentation link to point to the readme
• [X] #54 🐛 FIX: basic auth now follows redirects
• [X] #37 📦 NEW: Prosody XMPP authentication

Changes not affecting the app itself:

• [X] #50 🐛 FIX: PR Template