fix typescript typings, code cleanup, docs updated

docs/v4/index.html

@@ -39,7 +39,7 @@
           600,
           'easeOutQuad',
           function () {
-            console.log('READY')
+            console.log('READY');
           }
         );
       });
@@ -77,7 +77,7 @@
         loop: false,
         backDelay: 1200,
 
-      }
+      };
       var typed = new Typed('#typed', options);
     }
     function scrollIt(destination, duration = 200, easing = 'linear', callback) {
@@ -166,7 +166,7 @@
   <header class="bg-image-full">
     <div class="container">
       <a href="security.html" class="recommendation">Security advisory:<br>Update to v4.34.21</a>
-      <img class="logo" src="assets/logo.png">
+      <img class="logo" src="assets/logo.png" alt="logo">
       <div class="title">systeminformation </div>
       <div class="subtitle"><span id="typed"></span>&nbsp;</div>
       <div class="version larger">Version 4 documentation</div>