Add additional installation information to readme (#33)

Author: tinder-cfuller

README.md

@@ -50,14 +50,28 @@ UIKit is currently supported. CombineUI may support additional UI frameworks in
 
 ## Installation
 
-**Swift Package Manager Dependency**
+### Swift Package Manager
+
+**Package Dependency**
 
 > Replace `<version>` with the desired minimum version.
 
 ```swift
 .package(url: "https://github.com/Tinder/CombineUI.git", from: "<version>")
 ```
 
+**Target Dependency**
+
+```
+"CombineUI"
+```
+
+### Swift Package Collection
+
+```swift
+https://swiftpackageindex.com/Tinder/collection.json
+```
+
 ## Code Examples
 
 All examples require this setup: