feat: JSON format by space in json filter

src/filters/misc.ts

@@ -9,8 +9,8 @@ export function Default<T1 extends boolean, T2> (this: FilterImpl, value: T1, de
   return isFalsy(value, this.context) ? defaultValue : value
 }
 
-export function json (value: any) {
-  return JSON.stringify(value)
+export function json (value: any, space = 0) {
+  return JSON.stringify(value, null, space)
 }
 
 export const raw = {

src/util/timezone-date.spec.ts

@@ -26,7 +26,7 @@ describe('TimezoneDate', () => {
   })
   it('should support .toLocaleTimeString()', () => {
     const date = new TimezoneDate('2021-10-06T00:00:00.001+00:00', -480)
-    expect(date.toLocaleTimeString('en-US')).toBe('8:00:00 AM')
+    expect(date.toLocaleTimeString('en-US')).toMatch(/^8:00:00\sAM$/)
     expect(() => date.toLocaleDateString()).not.toThrow()
   })
   it('should support .toLocaleDateString()', () => {