chore: use mocha locally to run the tests

package.json

@@ -2,6 +2,7 @@
   "name": "umap",
   "version": "1.0.0-alpha.1",
   "description": "Manage map and features with Leaflet and expose them for backend storage through an API.",
+  "type": "module",
   "directories": {
     "test": "test"
   },
@@ -12,14 +13,14 @@
     "fetch-mock": "^9.11.0",
     "happen": "~0.1.3",
     "lebab": "^3.2.1",
-    "mocha": "^10.2.0",
+    "mocha": "^10.3.0",
     "optimist": "~0.4.0",
     "prettier": "^2.8.8",
     "sinon": "^15.1.0",
     "uglify-js": "~3.17.4"
   },
   "scripts": {
-    "test": "firefox test/index.html",
+    "test": "node_modules/mocha/bin/mocha.js",
     "vendors": "scripts/vendorsjs.sh"
   },
   "repository": {
@@ -30,7 +31,7 @@
     "leaflet"
   ],
   "author": "Yohan Boniface",
-  "license": "WTFPL",
+  "license": "AGPLv3",
   "bugs": {
     "url": "https://github.com/umap-project/Leaflet.Storage/issues"
   },