Adjust documentation

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:5.5
+// swift-tools-version:5.6
 
 import PackageDescription
 

README.md

@@ -1,11 +1,11 @@
 <p align="center">
-    <img src ="Resources/Logo.png" width=500 />
+    <img src ="Resources/Logo.png" width=500 alt="SwiftKit Logo" title="SwiftKit" />
 </p>
 
 <p align="center">
     <img src="https://img.shields.io/github/v/release/danielsaidi/SwiftKit?color=%2300550&sort=semver" alt="Version" />
     <img src="https://img.shields.io/badge/platform-SwiftUI-red.svg" alt="Swift UI" />
-    <img src="https://img.shields.io/badge/Swift-5.3-orange.svg" alt="Swift 5.3" />
+    <img src="https://img.shields.io/badge/Swift-5.6-orange.svg" alt="Swift 5.6" />
     <img src="https://img.shields.io/github/license/danielsaidi/SwiftKit" alt="MIT License" />
     <a href="https://twitter.com/danielsaidi">
         <img src="https://img.shields.io/badge/contact-@danielsaidi-blue.svg?style=flat" alt="Twitter: @danielsaidi" />
@@ -15,7 +15,7 @@
 
 ## About SwiftKit
 
-SwiftKit adds extra functionality to the Swift framework, like extensions to already existing types as well as completely new utilities, services, etc. 
+SwiftKit adds extra functionality to the Swift programming language, like extensions to already existing types as well as completely new utilites, services, etc. 
 
 You can explore the various sections in the [documentation][Documentation] and the demo app.
 

Sources/SwiftKit/Data/Persisted.swift

@@ -13,8 +13,8 @@ import Foundation
  to user defaults and sets the initial property value to the
  last persisted value or a fallback value.
  
- This type is internal, since the `SwiftUI` instance is used
- to greated extent.
+ This type is internal, since the `SwiftUI` tyope is used in
+ more ways. This type only serves the library functionality.
  */
 @propertyWrapper
 struct Persisted<T: Codable> {

Sources/SwiftKit/Extensions/String/String+Slugified.swift

@@ -10,19 +10,24 @@ import Foundation
 
 public extension String {
     
-    private static let allowedCharacters = NSCharacterSet(charactersIn: "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-")
-    
     /**
      Convert the string to a slugified version that works to
      be used as a tag.
-     
+
      For instance, `I'd love an AppleCar!` will be converted
      to "i-d-love-an-apple-car".
+
+     - Parameters:
+       - separator: The separator to use in the slugified string, by default `-`.
+       - allowedCharacters: The characters to allow in the slugified string, by default alphanumerical characters and `-`.
      */
-    func slugified() -> String {
+    func slugified(
+        separator: String = "-",
+        allowedCharacters: NSCharacterSet = NSCharacterSet(charactersIn: "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-")
+    ) -> String {
         self.lowercased()
-            .components(separatedBy: String.allowedCharacters.inverted)
-            .filter { $0 != "" }
-            .joined(separator: "-")
+            .components(separatedBy: allowedCharacters.inverted)
+            .filter { !$0.isEmpty }
+            .joined(separator: separator)
     }
 }