Upgrade swift-tools-version to 6.2

Author: kylehughes

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version: 6.0
+// swift-tools-version: 6.2
 
 import PackageDescription
 

Sources/PersistentKeyValueKit/Persistent Key-Value Representation/Implementations/ProxyPersistentKeyValueRepresentation.swift

@@ -29,7 +29,7 @@ public struct ProxyPersistentKeyValueRepresentation<Value, Proxy> where Proxy: K
         other: Other,
         to: @Sendable @escaping (Value) -> Other.Value,
         from: @Sendable @escaping (Other.Value) -> Value
-    ) where Other: ProxyPersistentKeyValueRepresentationProtocol, Other.Proxy == Proxy {
+    ) where Other: ProxyPersistentKeyValueRepresentationProtocol & SendableMetatype, Other.Proxy == Proxy, Proxy: SendableMetatype {
         self.to = { @Sendable in
             other.to(to($0))
         }