Fix EventEmitter for cross-platform compatibility (v0.18.3)

Replace Node.js 'events' module with 'eventemitter3' package
to ensure compatibility in both browser and Node.js environments.

Changes:
- Replace import from 'events' to 'eventemitter3'
- Add eventemitter3 as dependency
- Remove @types/node (no longer needed)

Fixes browser bundling error where 'events' module was not available.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

package-lock.json

@@ -9,11 +9,11 @@
       "version": "0.18.3",
       "license": "MIT",
       "dependencies": {
-        "@noble/ed25519": "^3.0.0"
+        "@noble/ed25519": "^3.0.0",
+        "eventemitter3": "^5.0.1"
       },
       "devDependencies": {
         "@eslint/js": "^9.39.1",
-        "@types/node": "^25.0.2",
         "@typescript-eslint/eslint-plugin": "^8.48.1",
         "@typescript-eslint/parser": "^8.48.1",
         "eslint": "^9.39.1",
@@ -1082,6 +1082,8 @@
       "integrity": "sha512-gWEkeiyYE4vqjON/+Obqcoeffmk0NF15WSBwSs7zwVA2bAbTaE0SJ7P0WNGoJn8uE7fiaV5a7dKYIJriEqOrmA==",
       "dev": true,
       "license": "MIT",
+      "optional": true,
+      "peer": true,
       "dependencies": {
         "undici-types": "~7.16.0"
       }
@@ -2001,6 +2003,12 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/eventemitter3": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-5.0.1.tgz",
+      "integrity": "sha512-GWkBvjiSZK87ELrYOSESUYeVIc9mvLLf/nXalMOS5dYrgZq9o5OVkbZAVM06CVxYsCwH9BDZFPlQTlPA1j4ahA==",
+      "license": "MIT"
+    },
     "node_modules/fast-deep-equal": {
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz",
@@ -2844,7 +2852,9 @@
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.16.0.tgz",
       "integrity": "sha512-Zz+aZWSj8LE6zoxD+xrjh4VfkIG8Ya6LvYkZqtUQGJPZjYl53ypCaUwWqo7eI0x66KBGeRo+mlBEkMSeSZ38Nw==",
       "dev": true,
-      "license": "MIT"
+      "license": "MIT",
+      "optional": true,
+      "peer": true
     },
     "node_modules/update-browserslist-db": {
       "version": "1.2.2",