fix crash when using with other UIScrollView subclass

Author: lkzhao

CollectionKit.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = "CollectionKit"
-  s.version          = "2.0.0"
+  s.version          = "2.0.1"
   s.summary          = "A modern swift framework for building data-driven reusable collection view components."
 
   s.description      = <<-DESC

Sources/Info.plist

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>2.0.0</string>
+	<string>2.0.1</string>
 	<key>CFBundleVersion</key>
 	<string>$(CURRENT_PROJECT_VERSION)</string>
 	<key>NSPrincipalClass</key>

Sources/Other/CollectionReloadable.swift

@@ -6,7 +6,7 @@
 //  Copyright © 2017 lkzhao. All rights reserved.
 //
 
-import Foundation
+import UIKit
 
 public protocol CollectionReloadable: class {
   var collectionView: CollectionView? { get }
@@ -52,7 +52,7 @@ internal class CollectionViewManager {
 // UIScrollView has a weird behavior where its contentOffset resets to .zero when
 // frame is assigned.
 // this swizzling fixed the issue. where the scrollview would jump during scroll
-extension CollectionView {
+extension UIScrollView {
   @objc func collectionKitAdjustContentOffsetIfNecessary(_ animated: Bool) {
     guard !isDragging && !isDecelerating else { return }
     self.perform(#selector(CollectionView.collectionKitAdjustContentOffsetIfNecessary))