Fix the formatting of the tests source file

Author: BartoszKlonowski

package/__test__/components/StepNumber.test.tsx

@@ -1,10 +1,10 @@
-import React from "react";
-import { render } from "@testing-library/react-native";
-import { StepNumber } from "../../src/components/StepNumber"
+import React from 'react';
+import {render} from '@testing-library/react-native';
+import {StepNumber} from '../../src/components/StepNumber';
 
-describe("StepNumber", () => {
-  it("Displays number of step according to given index", () => {
+describe('StepNumber', () => {
+  it('Displays number of step according to given index', () => {
     const {getByText} = render(<StepNumber i={0} style={undefined} />);
-    expect(getByText("0")).toBeDefined();
+    expect(getByText('0')).toBeDefined();
   });
 });