Use buildEvent function in more places

nip26.test.ts

@@ -1,4 +1,5 @@
 import {nip26, getPublicKey, generatePrivateKey} from '.'
+import { buildEvent } from './test-helpers'
 
 test('parse good delegation from NIP', async () => {
   expect(
@@ -94,14 +95,10 @@ test('create and verify delegation', async () => {
   expect(delegation).toHaveProperty('to', pk2)
   expect(delegation).toHaveProperty('cond', 'kind=1')
 
-  let event = {
+  let event = buildEvent({
     kind: 1,
     tags: [['delegation', delegation.from, delegation.cond, delegation.sig]],
     pubkey: pk2,
-    content: '',
-    created_at: 0,
-    id: '',
-    sig: '',
-  }
+  })
   expect(nip26.getDelegator(event)).toEqual(pk1)
 })