1.5.20

• fixes source import not working without a given url (thanks to @smilerz #3268)
• fixed typo in free space message (thanks to @Priyanshu1035 #3278)
• fixed Homeassistant connector working only in DEBUG mode (thansk to @mikhail5555 #3302)
• fixed Homeassistant connector not working with home assistant TODO entries without a description field (thanks to @ehowe #3305)
• updated several dependencies
• updated manual installation docs (thanks to IkkiOcean #3327)