Update to use @hpke/core, chacha20poly1305.

Author: dajiaji

x/hpke-js/import_map.json

@@ -1,14 +1,10 @@
 {
   "imports": {
     "@deno/dnt": "jsr:@deno/dnt@^0.41.2",
-    // "@hpke/core": "npm:@hpke/core@^1.2.9",
-    "@hpke/core": "../core/mod.ts",
-    // "@hpke/chacha20poly1305": "npm:@hpke/chacha20poly1305@^1.2.9",
-    "@hpke/chacha20poly1305": "../chacha20poly1305/mod.ts",
-    // "@hpke/dhkem-x25519": "npm:@hpke/dhkem-x25519@^1.2.9",
+    "@hpke/core": "npm:@hpke/core@^1.2.9",
+    "@hpke/chacha20poly1305": "npm:@hpke/chacha20poly1305@^1.2.9",
     "@hpke/dhkem-x25519": "../dhkem-x25519/mod.ts",
-    // "@hpke/dhkem-x448": "npm:@hpke/dhkem-x448@^1.2.9",
-    "@hpke/dhkem-x448": "../dhkem-x448/mod.ts",
+    "@hpke/dhkem-x448": "npm:@hpke/dhkem-x448@^1.2.9",
     "@std/assert": "jsr:@std/[email protected]",
     "@std/testing": "jsr:@std/testing@^1.0.0"
   }