Cloud Firestore .data() should return an any

[abeisgoat]

Version info

firebase-functions:
0.7.0

firebase-admin:
0.5.4

Test case

exports.onVisit = functions.firestore
  .document("visits/{visitId}")
  .onCreate(event => {
    const data = event.data.data(); // as type Object
    console.log(data["field"]); // Causes type error
 });

Expected behavior

data() should probably return an any

Actual behavior

data() returns an object