Update README.md

Author: ivanvorobei

README.md

@@ -2,6 +2,28 @@
 
 <img src="https://user-images.githubusercontent.com/10995774/159240125-e95bdd73-63e8-42a7-b2fc-a3073f2d3f2b.PNG" height="550"/>
 
+## Installation
+
+Ready for use on iOS 13+.
+
+### Swift Package Manager
+
+The [Swift Package Manager](https://swift.org/package-manager/) is a tool for automating the distribution of Swift code and is integrated into the `swift` compiler. It’s integrated with the Swift build system to automate the process of downloading, compiling, and linking dependencies.
+
+Once you have your Swift package set up, adding as a dependency is as easy as adding it to the `dependencies` value of your `Package.swift`.
+
+```swift
+dependencies: [
+    .package(url: "https://github.com/sparrowcode/SPQRCode", .upToNextMajor(from: "1.0.1"))
+]
+```
+
+### Manually
+
+If you prefer not to use any of dependency managers, you can integrate manually. Put `Sources/SPQRCode` folder in your Xcode project. Make sure to enable `Copy items if needed` and `Create groups`.
+
+## Usage
+
 Filter with handling data and simple example.
 
 ```swift