Linter: apply all recommended biome settings

Enforces previously-skipped useArrowFunction check

lib/output.js

@@ -1623,7 +1623,7 @@ function _pipeline (callback, stack) {
  * @module Sharp
  * @private
  */
-module.exports = function (Sharp) {
+module.exports = (Sharp) => {
   Object.assign(Sharp.prototype, {
     // Public
     toFile,