fix(core): update

ts/smarttime.classes.extendeddate.ts

@@ -1,5 +1,5 @@
-import * as plugins from './smarttime.plugins';
-import * as units from './smarttime.units';
+import * as plugins from './smarttime.plugins.js';
+import * as units from './smarttime.units.js';
 
 export type TAvailableZone = 'Europe/Berlin';
 
@@ -128,14 +128,14 @@ export class ExtendedDate extends Date {
     };
   }
 
-  public format (formatArg: string) {
+  public format(formatArg: string) {
     return plugins.dayjs(this.getTime()).format(formatArg);
   }
 
   /**
    * boolean checks
    */
-  public isToday () {
+  public isToday() {
     return plugins.dayjs(this.getTime()).isToday();
   }