fix crash because unregisterStep called after component unmounted

Author: prayuditb

src/hocs/copilot.js

@@ -78,6 +78,8 @@ const copilot = ({
 
       startTries = 0;
 
+      mounted = false;
+
       eventEmitter = mitt();
 
       isFirstStep = (): boolean => this.state.currentStep === this.getFirstStep();
@@ -94,6 +96,9 @@ const copilot = ({
       }
 
       unregisterStep = (stepName: string): void => {
+        if (!this.mounted) {
+          return;
+        }
         this.setState(({ steps }) => ({
           steps: Object.entries(steps)
             .filter(([key]) => key !== stepName)
@@ -149,6 +154,15 @@ const copilot = ({
         });
       }
 
+      componentDidMount() {
+        this.mounted = true;
+      }
+
+      componentWillUnmount() {
+        console.log('componentWillUnmount method')
+        this.mounted = false;
+      };
+
       render() {
         return (
           <View style={{ flex: 1 }}>