feat: send polls (#2377)

* feat: added Poll class

* feat: logic for sending polls added

* updated poll properties on returned message instance

* docs updated

* usage example updated

* module fixed

* 'pollSendOptions' changed to 'options'

* window.compareWwebVersions fixed

* small update to improve the performance of findImpl fix

* added option for custom message secret

* usage example updated

index.d.ts

@@ -707,6 +707,7 @@ declare namespace WAWebJS {
         PROTOCOL = 'protocol',
         REACTION = 'reaction',
         TEMPLATE_BUTTON_REPLY = 'template_button_reply',
+        POLL_CREATION = 'poll_creation',
     }
 
     /** Client status */
@@ -866,6 +867,11 @@ declare namespace WAWebJS {
         selectedRowId?: string,
         /** Returns message in a raw format */
         rawData: object,
+        pollName: string,
+        /** Avaiaible poll voting options */
+        pollOptions: string[],
+        /** False for a single choice poll, true for a multiple choice poll */
+        allowMultipleAnswers: boolean,
         /* 
         * Reloads this Message object's data in-place with the latest values from WhatsApp Web. 
         * Note that the Message must still be in the web app cache for this to work, otherwise will return null.
@@ -946,6 +952,27 @@ declare namespace WAWebJS {
         constructor(latitude: number, longitude: number, options?: LocationSendOptions)
     }
 
+    /** Poll send options */
+    export interface PollSendOptions {
+        /** False for a single choice poll, true for a multiple choice poll (false by default) */
+        allowMultipleAnswers?: boolean,
+        /**
+         * The custom message secret, can be used as a poll ID
+         * @note It has to be a unique vector with a length of 32
+         */
+        messageSecret: ?Array<number>
+    }
+
+    /** Represents a Poll on WhatsApp */
+    export interface Poll {
+        pollName: string,
+        pollOptions: Array<{
+            name: string,
+            localId: number
+        }>,
+        options: PollSendOptions
+    }
+
     export interface Label {
         /** Label name */
         name: string,
@@ -1037,7 +1064,7 @@ declare namespace WAWebJS {
         static fromUrl: (url: string, options?: MediaFromURLOptions) => Promise<MessageMedia>
     }
 
-    export type MessageContent = string | MessageMedia | Location | Contact | Contact[] | List | Buttons
+    export type MessageContent = string | MessageMedia | Location | Poll | Contact | Contact[] | List | Buttons
 
     /**
      * Represents a Contact on WhatsApp