Add platform requirements (#35)

* Add platform requirements

* bump

Author: stephencelis

Package.resolved

@@ -4,13 +4,19 @@ import PackageDescription
 
 let package = Package(
   name: "swift-url-routing",
+  platforms: [
+    .iOS(.v13),
+    .macOS(.v10_15),
+    .tvOS(.v13),
+    .watchOS(.v6),
+  ],
   products: [
     .library(name: "URLRouting", targets: ["URLRouting"])
   ],
   dependencies: [
     .package(url: "https://github.com/apple/swift-argument-parser", from: "0.5.0"),
-    .package(url: "https://github.com/pointfreeco/swift-parsing", from: "0.9.2"),
-    .package(url: "https://github.com/pointfreeco/xctest-dynamic-overlay", from: "0.2.1"),
+    .package(url: "https://github.com/pointfreeco/swift-parsing", from: "0.10.0"),
+    .package(url: "https://github.com/pointfreeco/xctest-dynamic-overlay", from: "0.3.0"),
     .package(name: "Benchmark", url: "https://github.com/google/swift-benchmark", from: "0.1.1"),
   ],
   targets: [