Update README

Author: stephencelis

README.md

@@ -143,7 +143,7 @@ If you want to use SnapshotTesting in any other project that uses [SwiftPM](http
 
 ```swift
 dependencies: [
-  .package(name: "SnapshotTesting", url: "https://github.com/pointfreeco/swift-snapshot-testing.git", from: "1.8.0"),
+  .package(name: "SnapshotTesting", url: "https://github.com/pointfreeco/swift-snapshot-testing.git", from: "1.8.1"),
 ]
 ```
 
@@ -179,7 +179,7 @@ If your project uses [CocoaPods](https://cocoapods.org), add the pod to any appl
 
 ```ruby
 target 'MyAppTests' do
-  pod 'SnapshotTesting', '~> 1.8.0'
+  pod 'SnapshotTesting', '~> 1.8.1'
 end
 ```