[Enhancement] Communications library for non Apple platforms (part II) (#16)

This PR contains the work done to make the `MockURLProtocol` class from the `Communications` library available for non-Apple platforms.

Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Reviewed-on: #16

Sources/Communications/Classes/MockURLProtocol.swift

@@ -10,9 +10,12 @@
 //
 //===----------------------------------------------------------------------===//
 
-#if os(iOS) || os(macOS) || os(tvOS) || os(watchOS)
 import Foundation
 
+#if canImport(FoundationNetworking)
+import FoundationNetworking
+#endif
+
 /// This class overrides the `URLProtocol` protocol used by the `URLSession` to handle the loading of protocol-specific URL data so it is possible to mock URL response for testing purposes.
 public class MockURLProtocol: URLProtocol {
     
@@ -117,4 +120,3 @@ public struct MockURLResponse {
     }
 
 }
-#endif