Fix method bindings

Author: t3chguy

src/CountlyAnalytics.ts

@@ -666,11 +666,11 @@ export default class CountlyAnalytics {
  return window.innerWidth > window.innerHeight ? Orientation.Landscape : Orientation.Portrait;
  };
 
- private reportOrientation() {
+ private reportOrientation = () => {
  this.track<IOrientationEvent>("[CLY]_orientation", {
  mode: this.getOrientation(),
  });
- }
+ };
 
  private startTime() {
  if (!this.trackTime) {
@@ -754,7 +754,7 @@ export default class CountlyAnalytics {
  }
  }
 
- private endSession() {
+ private endSession = () => {
  if (this.sessionStarted) {
  window.removeEventListener("resize", this.reportOrientation)
 
@@ -765,7 +765,7 @@ export default class CountlyAnalytics {
  });
  }
  this.sessionStarted = false;
- }
+ };
 
  private onVisibilityChange = () => {
  if (document.hidden) {