fix(FEC-8606): "Play 100%" event is not sent on IE11 Win7 (#30)

`const percent = this.player.currentTime / this.player.duration`, returned a number above 1 on IE 11, therefore, never entered, the if (!this._timePercentEvent.PLAY_REACHED_100 && percent === 1) condition.

The fix:

Limiting the float to have only 2 decimals at the end using the toFixed function.
Parsing the calculation using parseFloat function.

src/kava.js

@@ -321,7 +321,7 @@ class Kava extends BasePlugin {
   _onTimeUpdate(): void {
     if (!this.player.isLive()) {
       this._updatePlayTimeSumModel();
-      const percent = this.player.currentTime / this.player.duration;
+      const percent = parseFloat((this.player.currentTime / this.player.duration).toFixed(2));
       if (!this._timePercentEvent.PLAY_REACHED_25 && percent >= 0.25) {
         this._timePercentEvent.PLAY_REACHED_25 = true;
         this._sendAnalytics(KavaEventModel.PLAY_REACHED_25_PERCENT);