updated to swift 5.0

Author: ricky641

README.md

@@ -2,7 +2,7 @@
 
 [![Build Status](https://travis-ci.org/PiXeL16/PasswordTextField.svg?branch=master)](https://travis-ci.org/PiXeL16/PasswordTextField/) [![codecov.io](https://codecov.io/github/PiXeL16/PasswordTextField/coverage.svg?branch=master)](https://codecov.io/github/PiXeL16/PasswordTextField?branch=master) [![CocoaPods Compatible](https://img.shields.io/cocoapods/v/PasswordTextField.svg)](https://img.shields.io/cocoapods/v/PasswordTextField.svg) [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage)
 [![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg)](https://github.com/matteocrippa/awesome-swift) [![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/PiXeL16/PasswordTextField/master/LICENSE)
-[![Language](https://img.shields.io/badge/language-Swift%203.0-orange.svg)](https://swift.org)
+[![Language](https://img.shields.io/badge/language-Swift%205.0-orange.svg)](https://swift.org)
 
 # PasswordTextField
 A custom TextField with a switchable icon which shows or hides the password and enforces good password policies,  written in `Swift`.