fix: add "type": "module" in package.json

package.json

@@ -7,6 +7,7 @@
   "main": "main.js",
   "homepage": "https://cassiopee.g-eau.fr",
   "license": "MIT",
+  "type": "module", 
   "scripts": {
     "ng": "cd . && \"node_modules/.bin/ng\"",
     "postinstall": "./node_modules/.bin/webdriver-manager update --gecko=false --versions.chrome=107.0.5304.110",