Add bitrix24 events

[camaxtly]

https://github.com/mesilov/bitrix24-php-sdk/blob/master/src/classes/event/event.php#L21

BX24.callMethod('events', {});

{"result":["ONAPPUNINSTALL","ONAPPINSTALL","ONAPPUPDATE","ONAPPPAYMENT","ONAPPTEST","ONCRMLEADADD","ONCRMLEADUPDATE","ONCRMLEADDELETE","ONCRMDEALADD","ONCRMDEALUPDATE","ONCRMDEALDELETE","ONCRMCOMPANYADD","ONCRMCOMPANYUPDATE","ONCRMCOMPANYDELETE","ONCRMCONTACTADD","ONCRMCONTACTUPDATE","ONCRMCONTACTDELETE","ONCRMQUOTEADD","ONCRMQUOTEUPDATE","ONCRMQUOTEDELETE","ONCRMCURRENCYADD","ONCRMCURRENCYUPDATE","ONCRMCURRENCYDELETE","ONCRMPRODUCTADD","ONCRMPRODUCTUPDATE","ONCRMPRODUCTDELETE","ONCRMACTIVITYADD","ONCRMACTIVITYUPDATE","ONCRMACTIVITYDELETE","ONUSERADD","ONTASKADD","ONTASKUPDATE","ONTASKDELETE","ONTASKCOMMENTADD","ONTASKCOMMENTUPDATE","ONTASKCOMMENTDELETE","ONVOXIMPLANTCALLINIT","ONVOXIMPLANTCALLSTART","ONVOXIMPLANTCALLEND"]}