feat: add first failing test

__tests__/aggregate.spec.js

+const { buildAgregatedData } = require('../src/aggregate')
+describe('buildAgregatedData', () => {
+  it('should return empty', async () => {
+    const reply = await buildAgregatedData([], 'com.enedis.day')
+    expect(reply).toEqual([])
+  })
+})