Fix wrong async execute function on modular select

Author: G4brym

package.json

@@ -1,6 +1,6 @@
 {
   "name": "workers-qb",
-  "version": "1.6.0",
+  "version": "1.6.1",
   "description": "Zero dependencies Query Builder for Cloudflare Workers",
   "main": "./dist/index.js",
   "module": "./dist/index.mjs",

src/modularBuilder.ts

@@ -150,7 +150,7 @@ export class SelectBuilder<GenericResultWrapper, GenericResult = DefaultReturnOb
     return this._fetchOne(this._options as SelectAll)
   }
 
-  async execute(): Promise<ArrayResult<GenericResultWrapper, GenericResult>> {
+  execute(): MaybeAsync<IsAsync, ArrayResult<GenericResultWrapper, GenericResult>> {
     return this._fetchAll(this._options as SelectAll).execute()
   }