Add visionOS platform support (#38)

### Motivation

While this isn't technically necessary, as all versions of a platform
not explicitly mentioned are assumed to be supported, it's better to be
explicit here.

### Modifications

Add `visionOS(.v1)` to the list of supported platforms.

### Result

Clearer support matrix.

### Test Plan

N/A, this is basically just a documentation change.

Package.swift

@@ -32,7 +32,7 @@ if ProcessInfo.processInfo.environment["SWIFT_OPENAPI_STRICT_CONCURRENCY"].flatM
 let package = Package(
     name: "swift-openapi-urlsession",
     platforms: [
-        .macOS(.v10_15), .iOS(.v13), .tvOS(.v13), .watchOS(.v6),
+        .macOS(.v10_15), .iOS(.v13), .tvOS(.v13), .watchOS(.v6), .visionOS(.v1)
     ],
     products: [
         .library(

README.md

@@ -10,13 +10,11 @@ Use the transport with client code generated by [Swift OpenAPI Generator](https:
 
 ## Supported platforms and minimum versions
 
-| macOS     | Linux | iOS    | tvOS   | watchOS |
-| :-:       | :-:   | :-:    | :-:    | :-:     |
-| ✅ 10.15+ | ✅    | ✅ 13+ | ✅ 13+ | ✅ 6+   |
+| macOS     | Linux | iOS    | tvOS   | watchOS | visionOS |
+| :-:       | :-:   | :-:    | :-:    | :-:     | :-:      |
+| ✅ 10.15+ | ✅    | ✅ 13+ | ✅ 13+ | ✅ 6+   | ✅ 1+     |
 
-Note: Streaming support only available on macOS 12+, iOS 15+, tvOS 15+, and
-watchOS 8+.For streaming support on Linux, please use the [AsyncHTTPClient
-Transport](https://github.com/swift-server/swift-openapi-async-http-client)
+Note: Streaming support only available on macOS 12+, iOS 15+, tvOS 15+, watchOS 8+, and visionOS 1+. For streaming support on Linux, please use the [AsyncHTTPClient Transport](https://github.com/swift-server/swift-openapi-async-http-client)
 
 ## Usage
 

Sources/OpenAPIURLSession/Documentation.docc/Documentation.md

@@ -10,13 +10,11 @@ Use the transport with client code generated by [Swift OpenAPI Generator](https:
 
 ### Supported platforms and minimum versions
 
-| macOS     | Linux | iOS    | tvOS   | watchOS |
-| :-:       | :-:   | :-:    | :-:    | :-:     |
-| ✅ 10.15+ | ✅    | ✅ 13+ | ✅ 13+ | ✅ 6+   |
+| macOS     | Linux | iOS    | tvOS   | watchOS | visionOS |
+| :-:       | :-:   | :-:    | :-:    | :-:     | :-:      |
+| ✅ 10.15+ | ✅    | ✅ 13+ | ✅ 13+ | ✅ 6+   | ✅ 1+     |
 
-Note: Streaming support only available on macOS 12+, iOS 15+, tvOS 15+, and
-watchOS 8+.For streaming support on Linux, please use the [AsyncHTTPClient
-Transport](https://github.com/swift-server/swift-openapi-async-http-client)
+Note: Streaming support only available on macOS 12+, iOS 15+, tvOS 15+, watchOS 8+, and visionOS 1+. For streaming support on Linux, please use the [AsyncHTTPClient Transport](https://github.com/swift-server/swift-openapi-async-http-client)
 
 ### Usage