Beta support for Swift Testing (#25)

* Beta support for Swift Testing. * wip * wip * fix * wip * update snaps * update snapshot testing to 1.17 * wip * Updates * wip --------- Co-authored-by: Stephen Celis <stephen@stephencelis.com>

Author: mbrandonw

.swiftpm/configuration/Package.resolved

@@ -18,7 +18,7 @@ let package = Package(
  ],
  dependencies: [
  .package(url: "https://github.com/apple/swift-syntax", "509.0.0"..<"601.0.0-prerelease"),
- .package(url: "https://github.com/pointfreeco/swift-snapshot-testing", from: "1.16.0"),
+ .package(url: "https://github.com/pointfreeco/swift-snapshot-testing", from: "1.17.1"),
  ],
  targets: [
  .target(