feat: acceptGroupV4Invite (#677)

* Added option client.acceptGroupV4Invite()

* Update Client.js

* Update index.d.ts

Added a description to the inviteV4 object

Renamed "invite" by "inviteV4"

* Update Client.js

* Update Message.js

renamed "invite" to "inviteV4"

* Update Client.js

* Added message.acceptGroupV4Invite method

* Update index.d.ts

acceptGroupV4Invite

* better typings, refactor some names

Co-authored-by: Pedro Lopez <pedroslopez@me.com>

index.d.ts

@@ -19,6 +19,9 @@ declare namespace WAWebJS {
         /**Accepts an invitation to join a group */
         acceptInvite(inviteCode: string): Promise<string>
 
+        /** Accepts a private invitation to join a group (v4 invite) */
+        acceptGroupV4Invite: (inviteV4: InviteV4Data) => Promise<{status: number}>
+
         /**Returns an object with information about the invite code's group */
         getInviteInfo(inviteCode: string): Promise<object>
 
@@ -419,6 +422,7 @@ declare namespace WAWebJS {
         ORDER = 'order',
         PRODUCT = 'product',
         UNKNOWN = 'unknown',
+        GROUP_INVITE = 'groups_v4_invite',
     }
 
     /** Client status */
@@ -453,6 +457,15 @@ declare namespace WAWebJS {
         readRemaining: number
     }
 
+    export type InviteV4Data = {
+        inviteCode: string,
+        inviteCodeExp: number,
+        groupId: string,
+        groupName?: string,
+        fromId: string,
+        toId: string
+    }
+
     /**
      * Represents a Message on WhatsApp
      * 
@@ -510,6 +523,8 @@ declare namespace WAWebJS {
         location: Location,
         /** List of vCards contained in the message */
         vCards: string[],
+        /** Invite v4 info */
+        inviteV4?: InviteV4Data,
         /** MediaKey that represents the sticker 'ID' */
         mediaKey?: string,
         /** Indicates the mentions in the message body. */
@@ -536,6 +551,8 @@ declare namespace WAWebJS {
         businessOwnerJid?: string,
         /** Product JID */
         productId?: string,
+        /** Accept the Group V4 Invite in message */
+        acceptGroupV4Invite: () => Promise<{status: number}>,
         /** Deletes the message from the chat */
         delete: (everyone?: boolean) => Promise<void>,
         /** Downloads and returns the attatched message media */