message: replace document.querySelector w find
  will follow up and replace the rest in a separate PR
diff: import { module, test } from 'qunit';
  import { setupRenderingTest } from 'ember-qunit';
  -import { click, fillIn, render, waitUntil } from '@ember/test-helpers';
  +import { click, fillIn, find, render, waitUntil } from '@ember/test-helpers';
  import hbs from 'htmlbars-inline-precompile';
  import Layer2TestWeb3Strategy from '@cardstack/web-client/utils/web3-strategies/test-layer2';
  import WorkflowSession from '@cardstack/web-client/models/workflow/workflow-session';
  @@ -145,9 +145,8 @@ module(
  await fillIn(merchantIdInput, 'a-valid-id');
  await waitUntil(
  () =>
  - (document.querySelector(
  - '[data-test-validation-state-input]'
  - ) as HTMLElement).dataset.testValidationStateInput === 'valid'
  + (find('[data-test-validation-state-input]') as HTMLElement).dataset
  + .testValidationStateInput === 'valid'
  );
  assert.dom(SAVE_DETAILS_BUTTON).isDisabled();
  @@ -185,9 +184,8 @@ module(
  await fillIn(merchantIdInput, 'a-valid-id');
  await waitUntil(
  () =>
  - (document.querySelector(
  - '[data-test-validation-state-input]'
  - ) as HTMLElement).dataset.testValidationStateInput === 'valid'
  + (find('[data-test-validation-state-input]') as HTMLElement).dataset
  + .testValidationStateInput === 'valid'
  );
  assert.dom(SAVE_DETAILS_BUTTON).isEnabled();
  @@ -215,9 +213,8 @@ module(
  await fillIn(merchantIdInput, 'a-valid-id');
  await waitUntil(
  () =>
  - (document.querySelector(
  - '[data-test-validation-state-input]'
  - ) as HTMLElement).dataset.testValidationStateInput === 'valid'
  + (find('[data-test-validation-state-input]') as HTMLElement).dataset
  + .testValidationStateInput === 'valid'
  );
  await click(SAVE_DETAILS_BUTTON);
  @@ -236,9 +233,8 @@ module(
  await fillIn(merchantIdInput, 'a-valid-id');
  await waitUntil(
  () =>
  - (document.querySelector(
  - '[data-test-validation-state-input]'
  - ) as HTMLElement).dataset.testValidationStateInput === 'valid'
  + (find('[data-test-validation-state-input]') as HTMLElement).dataset
  + .testValidationStateInput === 'valid'
  );
  await click(SAVE_DETAILS_BUTTON);
  