update all but react-scripts (wrong execution of unit tests so they are failing)

fix failing tests because of missing implementation of mount() in enzyme for react 17

src/pages/Player/Player.js

@@ -1,7 +1,9 @@
 import React from 'react';
-import style from './Player.module.css';
 
-import {PlyrComponent} from 'plyr-react';
+import style from './Player.module.css';
+import plyrstyle from 'plyr-react/dist/plyr.css'
+
+import {Plyr} from 'plyr-react';
 import SideBar, {SideBarItem, SideBarTitle} from '../../elements/SideBar/SideBar';
 import Tag from '../../elements/Tag/Tag';
 import AddTagPopup from '../../elements/AddTagPopup/AddTagPopup';
@@ -168,9 +170,9 @@ class Player extends React.Component {
 
                 <div className={style.videowrapper}>
                     {/* video component is added here */}
-                    {this.state.sources ? <PlyrComponent
-                            className='myvideo'
-                            sources={this.state.sources}
+                    {this.state.sources ? <Plyr
+                        style={plyrstyle}
+                            source={this.state.sources}
                             options={this.options}/> :
                         <div>not loaded yet</div>}
                     <div className={style.videoactions}>

src/pages/Player/Player.test.js

@@ -20,7 +20,8 @@ describe('<Player/>', function () {
                 }
             ]
         });
-        expect(wrapper.find('r')).toHaveLength(1);
+
+        expect(wrapper.find('Plyr').dive().find('video')).toHaveLength(1);
     });
 
     function simulateLikeButtonClick() {