Add additional installation information to readme (#12)

Author: tinder-cfuller

README.md

@@ -61,14 +61,28 @@ func inserting(@Builder elements: () -> Self) -> Self
 
 ## Installation
 
-**Swift Package Manager Dependency**
+### Swift Package Manager
+
+**Package Dependency**
 
 > Replace `<version>` with the desired minimum version.
 
 ```swift
 .package(url: "https://github.com/Tinder/CollectionBuilders.git", from: "<version>")
 ```
 
+**Target Dependency**
+
+```
+"CollectionBuilders"
+```
+
+### Swift Package Collection
+
+```swift
+https://swiftpackageindex.com/Tinder/collection.json
+```
+
 ## Supported Types
 
 The `Array` and `Set` result builders may be used with any `Element` type.