improve TS declaration

Author: jonathantisseau

index.d.ts

@@ -1,9 +1,25 @@
-export function diff (originalObj: object, updatedObj: object): object
+export function diff(originalObj: any, updatedObj: any): any
+export function diff<T>(originalObj: T, updatedObj: T): Partial<T>
+export function diff<T, U>(originalObj: T, updatedObj: U): Partial<T & U>
 
-export function addedDiff (originalObj: object, updatedObj: object): object
+export function addedDiff(originalObj: any, updatedObj: any): any
+export function addedDiff<T>(originalObj: T, updatedObj: T): Partial<T>
+export function addedDiff<T, U>(originalObj: T, updatedObj: U): Partial<T & U>
 
-export function deletedDiff (originalObj: object, updatedObj: object): object
+export function deletedDiff(originalObj: any, updatedObj: any): any
+export function deletedDiff<T>(originalObj: T, updatedObj: T): Partial<T>
+export function deletedDiff<T, U>(originalObj: T, updatedObj: U): Partial<T & U>
 
-export function updatedDiff (originalObj: object, updatedObj: object): object
+export function updatedDiff(originalObj: any, updatedObj: any): any
+export function updatedDiff<T>(originalObj: T, updatedObj: T): Partial<T>
+export function updatedDiff<T, U>(originalObj: T, updatedObj: U): Partial<T & U>
 
-export function detailedDiff (originalObj: object, updatedObj: object): object
+export interface DetailedDiff<T> {
+	added: Partial<T>
+	deleted: Partial<T>
+	updated: Partial<T>
+}
+
+export function detailedDiff(originalObj: any, updatedObj: any): DetailedDiff<any>
+export function detailedDiff<T>(originalObj: T, updatedObj: T): DetailedDiff<T>
+export function detailedDiff<T, U>(originalObj: T, updatedObj: U): DetailedDiff<T & U>