Modify the "present" method from internal to public

LeeCenY · LeeCenY · commit ff0160c5439d · 2019-05-10T12:45:20.000+08:00
diff --git a/Source/SPAlert/SPAlertView.swift b/Source/SPAlert/SPAlertView.swift
@@ -136,7 +136,7 @@ open class SPAlertView: UIView {
     
     //MARK: - Public Methods
     
-    func present() {
+    public func present() {
         
         self.haptic.impact()
         
