Updated to Swift 5 and DidScroll delegate added

Framework/Sources/SpreadsheetView+UIScrollViewDelegate.swift

@@ -40,6 +40,7 @@ extension SpreadsheetView: UIScrollViewDelegate {
         columnHeaderView.contentOffset.y = tableView.contentOffset.y
 
         setNeedsLayout()
+        delegate?.spreadsheetViewDidScroll(self)
     }
 
     public func scrollViewDidEndScrollingAnimation(_ scrollView: UIScrollView) {

Framework/Sources/SpreadsheetView.swift

@@ -8,7 +8,7 @@
 
 import UIKit
 
-public class SpreadsheetView: UIView {
+open class SpreadsheetView: UIView {
     /// The object that provides the data for the collection view.
     ///
     /// - Note: The data source must adopt the `SpreadsheetViewDataSource` protocol.

Framework/Sources/SpreadsheetViewDelegate.swift

@@ -80,6 +80,7 @@ public protocol SpreadsheetViewDelegate: class {
     ///   - spreadsheetView: The spreadsheet view object that is notifying you of the selection change.
     ///   - indexPath: The index path of the cell that was deselected.
     func spreadsheetView(_ spreadsheetView: SpreadsheetView, didDeselectItemAt indexPath: IndexPath)
+    func spreadsheetViewDidScroll(_ spreadsheetView: SpreadsheetView)
 }
 
 extension SpreadsheetViewDelegate {
@@ -90,4 +91,5 @@ extension SpreadsheetViewDelegate {
     public func spreadsheetView(_ spreadsheetView: SpreadsheetView, shouldDeselectItemAt indexPath: IndexPath) -> Bool { return true }
     public func spreadsheetView(_ spreadsheetView: SpreadsheetView, didSelectItemAt indexPath: IndexPath) {}
     public func spreadsheetView(_ spreadsheetView: SpreadsheetView, didDeselectItemAt indexPath: IndexPath) {}
+    public func spreadsheetViewDidScroll(_ spreadsheetView: SpreadsheetView) {}
 }

Framework/SpreadsheetView.xcodeproj/project.pbxproj

@@ -382,6 +382,7 @@
 			developmentRegion = en;
 			hasScannedForEncodings = 0;
 			knownRegions = (
+				English,
 				en,
 				Base,
 			);