fix(types): serializers now take optional meta as second argument (#922)

Author: SteveBunlon

types/index.d.ts

@@ -103,9 +103,14 @@ interface RecordsSerialized {
   included: Record<string, unknown>[],
 }
 
+interface Meta {
+  count: number,
+  [k: string]: any,
+}
+
 export class AbstractRecordTool<M extends Sequelize.Model> {
   constructor(model: Sequelize.ModelCtor<M>, user: User, query: Query)
-  serialize(records: M | M[]): Promise<RecordsSerialized>;
+  serialize(records: M | M[], meta?: Meta): Promise<RecordsSerialized>;
 }
 
 export class RecordGetter<M extends Sequelize.Model> extends AbstractRecordTool<M> {
@@ -145,7 +150,7 @@ export class RecordsRemover<M extends Sequelize.Model> extends AbstractRecordToo
 
 export class RecordSerializer {
   constructor(model: { name: string } | Sequelize.ModelCtor<any>, user?: User, query?: Query);
-  serialize(records: Record<string, any> | Record<string, any>[], meta: Record<string, any>): Promise<RecordsSerialized>;
+  serialize(records: Record<string, any> | Record<string, any>[], meta?: Meta): Promise<RecordsSerialized>;
 }
 
 // Everything related to Forest permissions