feat: Branding ISO 8601 Month

Author: fiddur

packages/js-lib/src/datetime/localDate.test.ts

@@ -26,7 +26,7 @@ test('basic', () => {
   expect(ld.day).toBe(21)
   expect(ld.month).toBe(6)
   expect(ld.year).toBe(1984)
-  expect(ld.toIsoMonth()).toBe('1984-06')
+  expect(ld.toISOMonth()).toBe('1984-06')
   expect(ld.toDateObject()).toEqual({
     year: 1984,
     month: 6,

packages/js-lib/src/datetime/localDate.ts

@@ -479,7 +479,7 @@ export class LocalDate {
    * Returns e.g: `1984-06`
    */
   toISOMonth(): IsoMonth {
-    return this.toISODate().slice(0, 7)
+    return this.toISODate().slice(0, 7) as IsoMonth
   }
 
   /**

packages/js-lib/src/datetime/localTime.test.ts

@@ -49,7 +49,7 @@ test('basic', () => {
     expect(lt.valueOf()).toBe(1640995200)
     expect(lt.toJSON()).toBe(1640995200)
   }
-  expect(lt.toIsoMonth()).toBe('2022-01')
+  expect(lt.toISOMonth()).toBe('2022-01')
   const lt2 = lt.clone()
   expect(lt2).not.toBe(lt)
 

packages/js-lib/src/datetime/localTime.ts

@@ -715,7 +715,7 @@ export class LocalTime {
    * Returns e.g: `1984-06`
    */
   toISOMonth(): IsoMonth {
-    return this.toISODate().slice(0, 7)
+    return this.toISODate().slice(0, 7) as IsoMonth
   }
 
   /**