Update all dependencies

This takes part of the work being done in #96 that was reverted but still useful.

Note Tailwind and Fresh weren't upgraded because there's no security vulnerability in either, and I have found the new versions to be worse in performance. Thos will likely stay at those fixed versions going forward.

lib/utils/calendar_test.ts

@@ -1,5 +1,4 @@
-import { assertEquals } from 'std/assert/assert_equals.ts';
-import { assertMatch } from 'std/assert/assert_match.ts';
+import { assertEquals, assertMatch } from '@std/assert';
 
 import { Calendar, CalendarEvent } from '/lib/models/calendar.ts';
 import {