feat: add first failing test

__tests__/aggregate.spec.js

+describe('Filter function', () => {
+  // test stuff
+  it('should fail', () => {
+    expect(true).toBe(false)
+  })
+})

package.json

@@ -28,6 +28,7 @@
     "start": "node ./src/index.js",
     "dev": "cozy-konnector-dev",
     "standalone": "cozy-konnector-standalone",
+    "test": "jest",
     "pretest": "npm run clean",
     "clean": "rm -rf ./data",
     "build": "webpack",
@@ -40,6 +41,7 @@
   "dependencies": {
     "cozy-konnector-libs": "4.52.1",
     "easy-soap-request": "^4.7.0",
+    "jest": "^28.1.3",
     "moment": "^2.29.3",
     "moment-timezone": "^0.5.34",
     "xml2js": "^0.4.23"