eslint: upgrade to version 9 + tests: remove tests

package.json

@@ -43,13 +43,15 @@
     "@hapi/boom": "^9.1.3",
     "async-mutex": "^0.5.0",
     "axios": "^1.6.0",
-    "libsignal": "github:WhiskeySockets/libsignal-node",
+    "libsignal": "git+https://github.com/whiskeysockets/libsignal-node",
     "music-metadata": "^11.7.0",
     "pino": "^9.6",
     "protobufjs": "^7.2.4",
     "ws": "^8.13.0"
   },
   "devDependencies": {
+    "@eslint/eslintrc": "^3.3.1",
+    "@eslint/js": "^9.31.0",
     "@types/jest": "^30.0.0",
     "@types/node": "^16.0.0",
     "@types/ws": "^8.0.0",
@@ -57,18 +59,18 @@
     "@typescript-eslint/parser": "^8.32.0",
     "@whiskeysockets/eslint-config": "github:whiskeysockets/eslint-config",
     "conventional-changelog-cli": "^2.2.2",
-    "eslint": "^8.0.0",
+    "eslint": "^9.31.0",
     "eslint-config-prettier": "^10.1.2",
     "eslint-plugin-prettier": "^5.4.0",
     "jest": "^29.7.0",
     "jimp": "^1.6.0",
+    "jiti": "^2.4.2",
     "json": "^11.0.0",
     "link-preview-js": "^3.0.0",
     "open": "^8.4.2",
     "prettier": "^3.5.3",
     "protobufjs-cli": "^1.1.3",
     "release-it": "^15.10.3",
-    "sharp": "^0.34.2",
     "ts-jest": "^29.3.2",
     "tsx": "^4.20.3",
     "typedoc": "^0.27.9",
@@ -79,7 +81,7 @@
     "audio-decode": "^2.1.3",
     "jimp": "^1.6.0",
     "link-preview-js": "^3.0.0",
-    "sharp": "^0.34.2"
+    "sharp": "*"
   },
   "peerDependenciesMeta": {
     "audio-decode": {
@@ -90,12 +92,9 @@
     },
     "link-preview-js": {
       "optional": true
-    },
-    "sharp": {
-      "optional": true
     }
   },
-  "packageManager": "yarn@1.22.19",
+  "packageManager": "yarn@4.9.2",
   "engines": {
     "node": ">=20.0.0"
   }