Bug: events on last day of month not shown in range view

Dear jevents-team,

there is a bug i found in quering events in a range. Im using version 3.4.36.
Problem:
Events defined on the last day of a month wont show.
strings length will be never 10 eg. '2018-4-30' = 9. this means that the hh:mm:ss part wont be added to start- and enddate.

file to fix: components/com_jevents/libraries/dbmodel.php
function to fix: listIcalEventsByRange()
code part to fix: #2840, #2842

if (JString::strlen($startdate) == 10)

			$startdate.= " 00:00:00";

if (JString::strlen($enddate) == 10)

			$enddate.= " 23:59:59";