added: option to change tracking of campaigns once the campaign has been finished
improved: list counts are loaded now asynchronously to improve page load time
improved: embedded images are now found outside the upload folder
settings with "token" in the key are now hidden in the test email
new: growth rates on campaign overview
opens, clicks, unsubscribes and bounces are now sortable
minimum required PHP version is now 7.2.5
reduced size of vendor folder
