luci-app-radicale: bump to version 1.1.0

- support Radicale > v1.1
- modified version detection
- adaption to new function version_compare() in ipkg.lua
- adaption to fixed Flag.parse() in cbi.lua
- adaption to new property map.tabbed in cbi.lua using map template with extensions
- change optional values to non optional
- add support new option "system.boot_delay"

Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>