chore: Update swift-tools and visionOS version (#6764)

* chore: Update swift-tools and visionOS version

* Add nonisolated

* Revert "Add nonisolated"

This reverts commit d72390b.

* Language mode

Author: noahsmartin

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:5.5
+// swift-tools-version:6.0
 #if canImport(Darwin)
 import Darwin.C
 #elseif canImport(Glibc)
@@ -114,8 +114,9 @@ var targets: [Target] = [
 
 let package = Package(
     name: "Sentry",
-    platforms: [.iOS(.v15), .macOS(.v12), .tvOS(.v15), .watchOS(.v8)],
+    platforms: [.iOS(.v15), .macOS(.v12), .tvOS(.v15), .watchOS(.v8), .visionOS(.v1)],
     products: products,
     targets: targets,
+    swiftLanguageModes: [.v5],
     cxxLanguageStandard: .cxx14
 )