fix lint

playground/e2e/app.test.js

     elementByLabel('Pop').tap();
     expect(elementByLabel('React Native Navigation!')).toBeVisible();
   });
-  
+
   it('pop screen deep in the stack', () => {
     elementByLabel('Push').tap();
     expect(elementByLabel('Stack Position: 1')).toBeVisible();
   });
 });
 
-
 describe('modal', () => {
   beforeEach((done) => {
     global.simulator.relaunchApp(done);
   });
-  
+
   it('show modal', () => {
     elementByLabel('Show Modal').tap();
     expect(elementByLabel('Modal Screen')).toBeVisible();
   });
-  
+
   it('dismiss modal', () => {
     elementByLabel('Show Modal').tap();
     expect(elementByLabel('Modal Screen')).toBeVisible();
     elementByLabel('Dismiss Modal').tap();
     expect(elementByLabel('React Native Navigation!')).toBeVisible();
   });
-  
+
   it('show multiple modals', () => {
     elementByLabel('Show Modal').tap();
     expect(elementByLabel('Modal Stack Position: 1')).toBeVisible();
     elementByLabel('Dismiss Modal').tap();
     expect(elementByLabel('React Native Navigation!')).toBeVisible();
   });
-  
+
   it('dismiss unknown screen id', () => {
     elementByLabel('Show Modal').tap();
     expect(elementByLabel('Modal Stack Position: 1')).toBeVisible();
     elementByLabel('Dismiss Modal').tap();
     expect(elementByLabel('React Native Navigation!')).toBeVisible();
   });
-  
+
   it('dismiss modal by id which is not the top most', () => {
     elementByLabel('Show Modal').tap();
     expect(elementByLabel('Modal Stack Position: 1')).toBeVisible();
     elementByLabel('Dismiss Modal').tap();
     expect(elementByLabel('React Native Navigation!')).toBeVisible();
   });
-  
+
   it('dismiss all previous modals by id when they are below top presented modal', () => {
     elementByLabel('Show Modal').tap();
     expect(elementByLabel('Modal Stack Position: 1')).toBeVisible();
     expect(elementByLabel('Modal Stack Position: 2')).toBeVisible();
     elementByLabel('Show Modal').tap();
     expect(elementByLabel('Modal Stack Position: 3')).toBeVisible();
-    
+
     elementByLabel('Dismiss ALL Previous Modals').tap();
     expect(elementByLabel('Modal Stack Position: 3')).toBeVisible();
-    
+
     elementByLabel('Dismiss Modal').tap();
     expect(elementByLabel('React Native Navigation!')).toBeVisible();
   });
-  
+
   it('dismiss some modal by id deep in the stack', () => {
     elementByLabel('Show Modal').tap();
     expect(elementByLabel('Modal Stack Position: 1')).toBeVisible();
     expect(elementByLabel('Modal Stack Position: 2')).toBeVisible();
     elementByLabel('Show Modal').tap();
     expect(elementByLabel('Modal Stack Position: 3')).toBeVisible();
-    
+
     elementByLabel('Dismiss First In Stack').tap();
     expect(elementByLabel('Modal Stack Position: 3')).toBeVisible();
-    
+
     elementByLabel('Dismiss Modal').tap();
     expect(elementByLabel('Modal Stack Position: 2')).toBeVisible();
-    
+
     elementByLabel('Dismiss Modal').tap();
     expect(elementByLabel('React Native Navigation!')).toBeVisible();
   });
-  
+
   it('dismissAllModals', () => {
     elementByLabel('Show Modal').tap();
     expect(elementByLabel('Modal Stack Position: 1')).toBeVisible();