Add mutable defaultOptions to util

Author: TheSpyder

src/Util.res

@@ -17,6 +17,21 @@ external inspectOptions: (
   unit,
 ) => inspectOptions = ""
 
+type defaultInspectOptions = {
+  mutable showHidden: bool,
+  mutable depth: Js.Null.t<int>,
+  mutable colors: bool,
+  mutable customInspect: bool,
+  mutable showProxy: bool,
+  mutable maxArrayLength: Js.Null.t<int>,
+  mutable breakLength: int,
+  mutable compact: bool,
+  mutable sorted: bool,
+  mutable getters: bool,
+};
+@val @module("util") @scope("inspect")
+external defaultOptions: defaultInspectOptions = "defaultOptions"
+
 module Types = {
   @val @module("util") @scope("types")
   external isAnyArrayBuffer: 'a => bool = "isAnyArrayBuffer"