DPO-2282 Move Writable to @digitraffic/common

src/types/util-types.ts

@@ -1 +1,10 @@
 export type ValueOf<Obj> = Obj[keyof Obj];
+
+/**
+ * Type-level conversion from readonly object to mutable object. Use with caution!
+ *
+ * Only converts in the type-level. Caution must be used, as the typescript cannot enforce readonly-ness at
+ * runtime. This is only useful for type-checking and especially in cases where 3rd party code requires
+ * mutable even though it is not needed.
+ */
+export type Writable<T> = { -readonly [P in keyof T]: T[P] };