Extend function to accept additional types (null, undefined, number, boolean)

Author: 1aron

packages/json-safe-extend/src/index.ts

@@ -1,4 +1,4 @@
-export default function extend<T extends object>(...sources: Partial<T>[]): T {
+export default function extend<T extends object>(...sources: (Partial<T> | null | undefined | number | boolean)[]): T {
     const target: any = {}
 
     for (const obj of sources) {

packages/json-safe-extend/tests/test.ts

@@ -139,7 +139,7 @@ it('doesn\'t change sources', function () {
     const a = { a: [1] }
     const b = { a: [2] }
     const c = { c: 3 }
-    const d = extend({}, a, b, c)
+    const d = extend<any>({}, a, b, c)
 
     expect(a).toEqual({ a: [1] })
     expect(b).toEqual({ a: [2] })
@@ -249,7 +249,7 @@ it('prevent source contamination', () => {
         }
     }
 
-    extend(source, {
+    extend<any>(source, {
         1: {
             4: true
         }