feat(Permissions): Add bigint support for perm check (#1374)

Co-authored-by: Donovan Daniels <[email protected]>

index.d.ts

@@ -3148,7 +3148,7 @@ declare namespace Eris {
     deny: bigint;
     json: Record<keyof Constants["Permissions"], boolean>;
     constructor(allow: number | string | bigint, deny?: number | string | bigint);
-    has(permission: keyof Constants["Permissions"]): boolean;
+    has(permission: keyof Constants["Permissions"] | bigint): boolean;
   }
 
   export class PermissionOverwrite extends Permission {

lib/structures/Permission.js

@@ -45,10 +45,13 @@ class Permission extends Base {
 
     /**
     * Check if this permission allows a specific permission
-    * @arg {String} permission The name of the permission. [A full list of permission nodes can be found on the docs reference page](/Eris/docs/reference)
+    * @arg {String | BigInt} permission The name of the permission, or bit of permissions. [A full list of permission nodes can be found on the docs reference page](/Eris/docs/reference). Pass a BigInt if you want to check multiple permissions.
     * @returns {Boolean} Whether the permission allows the specified permission
     */
     has(permission) {
+        if(typeof permission === "bigint") {
+            return (this.allow & permission) === permission;
+        }
         return !!(this.allow & Permissions[permission]);
     }