Add spec for viewHierarchyEnabled method in Instabug module

Author: AliAbdelfattah

InstabugSample/ios/InstabugSampleTests/InstabugSampleTests.m

@@ -256,6 +256,12 @@ - (void)testClearAllUserAttributes {
   OCMVerify([mock removeUserAttributeForKey:key]);
 }
 
+- (void)testSetViewHierarchyEnabled {
+  BOOL enabled = true;
+  [self.instabugBridge setViewHierarchyEnabled:enabled];
+  XCTAssertTrue(Instabug.shouldCaptureViewHierarchy);
+}
+
 - (void)testShowWelcomeMessageWithMode {
   id mock = OCMClassMock([Instabug class]);
   IBGWelcomeMessageMode welcomeMessageMode = IBGWelcomeMessageModeBeta;

ios/RNInstabug/InstabugReactBridge.h

@@ -68,6 +68,8 @@
 
 - (void)clearAllUserAttributes;
 
+- (void)setViewHierarchyEnabled:(BOOL)viewHierarchyEnabled;
+
 - (void)showWelcomeMessageWithMode:(IBGWelcomeMessageMode)welcomeMessageMode;
 
 - (void)setWelcomeMessageMode:(IBGWelcomeMessageMode)welcomeMessageMode;