Fix accidental public api

StripeCore/StripeCore/Source/Categories/NSArray+Stripe.swift

@@ -8,28 +8,28 @@
 
 import Foundation
 
-@_spi(STP) extension Array {
-    public func stp_boundSafeObject(at index: Int) -> Element? {
+@_spi(STP) public extension Array {
+    func stp_boundSafeObject(at index: Int) -> Element? {
         if index + 1 > count || index < 0 {
             return nil
         }
         return self[index]
     }
 }
 
-extension Array where Element == String {
-    public func caseInsensitiveContains(_ other: String) -> Bool {
+@_spi(STP) public extension Array where Element == String {
+    func caseInsensitiveContains(_ other: String) -> Bool {
         return self.map { $0.uppercased() }.contains(other.uppercased())
     }
 }
 
-extension Array where Element: Equatable {
-    @discardableResult public mutating func remove(_ element: Element) -> Element? {
+@_spi(STP) public extension Array where Element: Equatable {
+    @discardableResult mutating func remove(_ element: Element) -> Element? {
         guard let index = firstIndex(of: element) else { return nil }
         return remove(at: index)
     }
 
-    @discardableResult public mutating func replace(_ element: Element, with newElement: Element) -> Element? {
+    @discardableResult mutating func replace(_ element: Element, with newElement: Element) -> Element? {
         guard let index = firstIndex(of: element) else { return nil }
         let removedElement = remove(at: index)
         insert(newElement, at: index)