Address linting and SonarQube errors

Author: binarykitchen

src/util/Browser.ts

@@ -75,7 +75,7 @@ class Browser {
       return false;
     }
 
-    return this.isSafari() && parseFloat(version) >= 11;
+    return this.isSafari() && Number.parseFloat(version) >= 11;
   }
 
   public getVideoType(video: HTMLVideoElement) {

src/wrappers/visuals/inside/recorder/countdown.ts

@@ -49,7 +49,7 @@ class Countdown {
     }
 
     if (typeof this.options.video.countdown !== "number") {
-      throw new Error(
+      throw new TypeError(
         `The defined countdown is not a valid number: ${this.options.video.countdown}`,
       );
     }

src/wrappers/visuals/replay.ts

@@ -366,7 +366,7 @@ class Replay extends Despot {
         firstTrack.setAttribute("src", src);
       } else {
         // Remove when no captions available
-        this.replayElement.removeChild(firstTrack);
+        firstTrack.remove();
       }
     } else {
       // Insert one then
@@ -420,7 +420,7 @@ class Replay extends Despot {
     } else if (src) {
       source.setAttribute("src", src);
     } else {
-      this.replayElement.removeChild(source);
+      source.remove();
     }
   }