Can't search by customer email

[bushev]

Command:

curl localhost:8420/v1/customers?email=test@example.com -u sk_test_12345:

Expected: A customer object returned

Actual:

{
  "error": {
    "message": "Unexpected email",
    "type": "invalid_request_error"
  }
}

[adrienverge]

@bushev do you want to contribute this feature to localstripe?