feat: jsr support

jsr.json

@@ -0,0 +1,5 @@
+{
+  "name": "@badosz/holy-time",
+  "version": "3.4.5",
+  "exports": "./src/index.ts"
+}

src/index.ts

@@ -1,3 +1,3 @@
-export { TimeZone } from './constants';
+export type { TimeZone } from './constants';
 export { HolyTime as default } from './time';
 export type { TimeResolvable, HumanUnit, IntervalUnit } from './types';

src/time.ts

@@ -26,7 +26,7 @@ export class HolyTime {
       return date;
     }
 
-    timeZone = TIMEZONE_MAP[timeZone] ?? timeZone;
+    timeZone = TIMEZONE_MAP[timeZone as keyof typeof TIMEZONE_MAP] ?? timeZone;
 
     return new Date(date.toLocaleString('en-US', { timeZone }));
   }