fix device version (#45)

Co-authored-by: Oguz Yuksel <oguz.yueksel@teufel.de>

Author: OguzYuuksel

Sources/FoundationExtensions/Combine/Publisher+EraseFailureToError.swift

@@ -2,6 +2,7 @@
 import Combine
 import Foundation
 
+@available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
 extension Publisher {
     /// Erases `Failure` type to `Error`.
     ///
@@ -13,7 +14,6 @@ extension Publisher {
     ///     .eraseFailureToError() // Publishers.MapError<Empty<Int, DecodingError>, Error>
     ///
     /// - Returns: An ``Publishers.MapError`` wrapping this publisher.
-    @available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
     public func eraseFailureToError() -> Publishers.MapError<Self, Error> {
         mapError(identity)
     }

Sources/FoundationExtensions/Promise/PromiseType+EraseFailureToError.swift

@@ -4,14 +4,14 @@
 import Foundation
 import Combine
 
+@available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
 extension PromiseType {
     /// Erases `Failure` type to `Error`.
     ///
     ///     Publishers.Promise<Int, Never>(value: 1) // Publishers.Promise<Int, Never>
     ///         .eraseFailureToError() // Publishers.Promise<Publishers.Promise<Int, Never>.Output, Error>
     ///
     /// - Returns: An ``Publishers.Promise`` wrapping this promise.
-    @available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
     public func eraseFailureToError() -> Publishers.Promise<Output, Error> {
         mapError(identity)
     }