release 2.0 beta (#3722)

* remove twitter link
* remove WIP file
* adjust release draft message
* reset code coverage threshold back to 0.5
* changed wordings
* re-activate wizard for fixture accounts
* fix repo url and license
* license identifier
* bump version
* moved Kimai 1 import command from core to plugin
* do not traverse into invoice template subdirectories (#3735)
* fix branch alias
* composer update
* switch language on wizard select
* new twig function to create qr code
* fix daily stats in timesheet listing
* improved html invoice templates

templates/invoice/renderer/invoice.html.twig

@@ -62,7 +62,7 @@
     <div class="col-sm-7"></div>
 </div>
 
-<div class="row invoice-items">
+<div class="row invoice-items mt-2 mb-3">
     <div class="col-xs-12 table-responsive">
         <table class="table">
             <thead>