Adding back code removed due to merge conflict

SessionUtilitiesKit/General/Array+Utilities.swift

@@ -1,11 +1,27 @@
+import Foundation
 
-public extension Array where Element : CustomStringConvertible {
-
+public extension Array where Element: CustomStringConvertible {
     var prettifiedDescription: String {
         return "[ " + map { $0.description }.joined(separator: ", ") + " ]"
     }
 }
 
+public extension Array {
+    func appending(_ other: Element) -> [Element] {
+        var updatedArray: [Element] = self
+        updatedArray.append(other)
+
+        return updatedArray
+    }
+    
+    func appending(_ other: [Element]) -> [Element] {
+        var updatedArray: [Element] = self
+        updatedArray.append(contentsOf: other)
+
+        return updatedArray
+    }
+}
+
 public extension Array where Element: Hashable {
     func asSet() -> Set<Element> {
         return Set(self)