fix(typings): fn is assignable to where (#12040)

types/lib/model.d.ts

@@ -110,7 +110,7 @@ export interface ScopeOptions {
 /**
  * The type accepted by every `where` option
  */
-export type WhereOptions = WhereAttributeHash | AndOperator | OrOperator | Literal | Where;
+export type WhereOptions = WhereAttributeHash | AndOperator | OrOperator | Literal | Fn | Where;
 
 /**
  * Example: `[Op.any]: [2,3]` becomes `ANY ARRAY[2, 3]::INTEGER`

types/test/where.ts

@@ -291,6 +291,8 @@ where = whereFn('test', {
 // Literal as where
 where = literal('true')
 
+where = fn('LOWER', 'asd')
+
 MyModel.findAll({
     where: literal('true')
 })