feat: vote_update event (#2596)

* Merge branch 'add-polls' into polls-ext

* added listener to poll votes

* added isUnvote property

* added option for custom message secret

* usage example updated

* added logic for catching removed votes

* usage example updated

* fixed logic for poll vote events

* temp usage example

* No more `isCurrentState`

* messageSecret converted to array

Co-authored-by: tuyuribr <45042245+tuyuribr@users.noreply.github.com>

* docs updated

* we already have messageSecret in vote.parentMessage

* PollVote.selectedOptions changed to be similar to pollOptions

* docs fixed

* window.injectToFunction clarifications

* minor clarifications

* fix: typo

* style: fix broken link in readme file

---------

Co-authored-by: tuyuribr <45042245+tuyuribr@users.noreply.github.com>

src/util/Constants.js

@@ -65,7 +65,8 @@ exports.Events = {
     STATE_CHANGED: 'change_state',
     BATTERY_CHANGED: 'change_battery',
     INCOMING_CALL: 'call',
-    REMOTE_SESSION_SAVED: 'remote_session_saved'
+    REMOTE_SESSION_SAVED: 'remote_session_saved',
+    VOTE_UPDATE: 'vote_update'
 };
 
 /**