Use HTTPS for README URLs

README.md

@@ -10,12 +10,12 @@ ColorSlider is an iOS color picker with live preview written in [Swift](https://
 
 |           | Features                                 |
 | :-------: | :--------------------------------------- |
-| :ghost: | "[Snapchat](http://snapchat.com)-style" color picker |
+| :ghost: | "[Snapchat](https://snapchat.com)-style" color picker |
 | :rainbow: | Extensible live preview                  |
 | :art: | Customizable appearance                  |
 | :cyclone: | Vertical and horizontal support          |
 | :musical_keyboard: | Black and white colors included          |
-| :books: | Fully [documented](http://gizmosachin.github.io/ColorSlider) |
+| :books: | Fully [documented](https://gizmosachin.github.io/ColorSlider) |
 | :baby_chick: | [Swift 5](https://developer.apple.com/swift/) |
 
 ## Usage
@@ -77,11 +77,11 @@ To disable the preview, simply pass `nil` to ColorSlider's initializer:
 let colorSlider = ColorSlider(orientation: .vertical, previewView: nil)
 ```
 
-See the [documentation](http://gizmosachin.github.io/ColorSlider) for more details on custom previews.
+See the [documentation](https://gizmosachin.github.io/ColorSlider) for more details on custom previews.
 
 ### Documentation
 
-ColorSlider is fully documented [here](http://gizmosachin.github.io/ColorSlider).
+ColorSlider is fully documented [here](https://gizmosachin.github.io/ColorSlider).
 
 ## Installation