feat(headerspec): add UTF-8 encoding/decoding support

* Implement round-trip encoding/decoding for UTF-8 values in header functions.
* Update encodeHeaderValue and decodeHeaderValue to use base64 utility functions.
* Add tests for UTF-8 header value handling.
* Update Vite config to externalize base64 utility.

resolvespec-js/package.json

@@ -38,20 +38,22 @@
   "author": "Hein (Warkanum) Puth",
   "license": "MIT",
   "dependencies": {
-    "uuid": "^13.0.0"
+    "@warkypublic/artemis-kit": "^1.0.10",
+    "uuid": "^14.0.2"
   },
   "devDependencies": {
-    "@changesets/cli": "^2.29.8",
+    "@changesets/cli": "^3.0.3",
     "@eslint/js": "^10.0.1",
-    "@types/jsdom": "^27.0.0",
-    "eslint": "^10.0.0",
-    "globals": "^17.3.0",
-    "jsdom": "^28.1.0",
-    "typescript": "^5.9.3",
-    "typescript-eslint": "^8.55.0",
-    "vite": "^7.3.1",
-    "vite-plugin-dts": "^4.5.4",
-    "vitest": "^4.0.18"
+    "@types/jsdom": "^30.0.0",
+    "@types/node": "^26.6.2",
+    "eslint": "^10.11.0",
+    "globals": "^17.12.0",
+    "jsdom": "^30.1.1",
+    "typescript": "^6.0.3",
+    "typescript-eslint": "^8.70.1",
+    "vite": "^8.3.0",
+    "vite-plugin-dts": "^5.1.1",
+    "vitest": "^5.0.1"
   },
   "engines": {
     "node": ">=18"