message: style(devtools): add call signatures
diff: @@ -6,8 +6,8 @@ import {
  getAngularVersion,
  } from './angular-check';
  -const setNgVersion = (version = '12.0.0') => document.documentElement.setAttribute('ng-version', version);
  -const removeNgVersion = () => document.documentElement.removeAttribute('ng-version');
  +const setNgVersion = (version = '12.0.0'): void => document.documentElement.setAttribute('ng-version', version);
  +const removeNgVersion = (): void => document.documentElement.removeAttribute('ng-version');
  describe('angular-check', () => {
  afterEach(() => removeNgVersion());
  @@ -54,7 +54,7 @@ describe('angular-check', () => {
  describe('appIsAngularIvy', () => {
  it('should not recognize VE apps', () => {
  (window as any).ng = {
  - probe() {},
  + probe(): void {},
  };
  setNgVersion();
  expect(appIsAngularIvy()).toBeFalse();
  @@ -65,7 +65,7 @@ describe('angular-check', () => {
  });
  it('should recognize Ivy apps', () => {
  - (window as any).getAllAngularRootElements = () => {
  + (window as any).getAllAngularRootElements = (): Element[] => {
  const el = document.createElement('div');
  (el as any).__ngContext__ = 0;
  return [el];
  @@ -82,7 +82,7 @@ describe('angular-check', () => {
  it('should detect VE apps', () => {
  (window as any).ng = {
  - probe() {},
  + probe(): void {},
  };
  setNgVersion();
  @@ -91,7 +91,7 @@ describe('angular-check', () => {
  it('should detect Ivy apps', () => {
  (window as any).ng = {
  - getComponent() {},
  + getComponent(): void {},
  };
  setNgVersion();
  expect(appIsAngularInDevMode()).toBeTrue();
  