fix: ie fix for event bindings on unmounted components (jquense#1338)

* IE fix for event bindings on unmounted components.

* Fix Unable to get property x of undefined or null reference

Author: dkniffin

src/Selection.js

@@ -44,6 +44,7 @@ const clickInterval = 250
 
 class Selection {
   constructor(node, { global = false, longPressThreshold = 250 } = {}) {
+    this.isDetached = false
     this.container = node
     this.globalMouse = !node || global
     this.longPressThreshold = longPressThreshold
@@ -95,6 +96,7 @@ class Selection {
   }
 
   teardown() {
+    this.isDetached = true
     this.listeners = Object.create(null)
     this._onTouchMoveWindowListener && this._onTouchMoveWindowListener.remove()
     this._onInitialEventListener && this._onInitialEventListener.remove()
@@ -206,6 +208,10 @@ class Selection {
   }
 
   _handleInitialEvent(e) {
+    if (this.isDetached) {
+      return
+    }
+
     const { clientX, clientY, pageX, pageY } = getEventCoordinates(e)
     let node = this.container(),
       collides,
@@ -344,7 +350,7 @@ class Selection {
   }
 
   _handleMoveEvent(e) {
-    if (this._initialEventData === null) {
+    if (this._initialEventData === null || this.isDetached) {
       return
     }