[Bugfix] Mobile platform builds (#11)

This PR contains the work done to address the issue #10, that was raised based on the build logs from publishing the package in the Swift Package Index.

To provide further details about the work done:
- [x] fixed the `Router` protocol that was causing a compilation issue on *watchOS* platforms;
- [x] downgraded the swift tools version in the `Package` file to v5.5;
- [x] bumped the minimum platform version in the `Package` file to restrict support to the last 2 major releases;
- [x] written the *Installation* section in the `README` file;
- [x] updated the project logo assets, including light and dark versions;
- [x] updated the project logo in the `README` file and added support for both light and dark modes.

Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Reviewed-on: #11

Package.swift

@@ -1,4 +1,13 @@
-// swift-tools-version: 5.8
+// swift-tools-version: 5.5
+//
+// This source file is part of the SwiftLibs open source project
+//
+// Copyright (c) 2023 Röck+Cöde VoF. and the SwiftLibs project authors
+// Licensed under the EUPL 1.2 or later.
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of SwiftLibs project authors
+//
 
 import PackageDescription
 
@@ -11,10 +20,10 @@ excludePlatforms = []
 let package = Package(
     name: "SwiftLibs",
     platforms: [
-        .iOS(.v13),
-        .macOS(.v10_15),
-        .tvOS(.v13),
-        .watchOS(.v6)
+        .iOS(.v15),
+        .macOS(.v12),
+        .tvOS(.v15),
+        .watchOS(.v8)
     ],
     products: [
         .library(
@@ -30,7 +39,6 @@ let package = Package(
     ],
     dependencies: [],
     targets: [
-        // MARK: Targets
         .target(
             name: "Communications",
             dependencies: []
@@ -52,7 +60,6 @@ let package = Package(
             name: "Persistence",
             dependencies: []
         ),
-        // MARK: Test targets
         .testTarget(
             name: "CommunicationsTests",
             dependencies: [

README.md

@@ -1,5 +1,8 @@
-<center style="padding: 32px 96px;">
-    <img src="swift-libs-logo.svg" alt="SwiftLibs logo">
+<center>
+    <picture>
+        <source srcset="imgs/swiftlibs-logo-dark.svg" media="(prefers-color-scheme: dark)">
+        <img src="imgs/swiftlibs-logo-light.svg" alt="Shows the hand-drawn SwiftLibs package logo centered in the page.">
+    </picture>
 </center>
 
 # SwiftLibs
@@ -16,3 +19,60 @@ To provide further details about the libraries included in this package:
 * `Core`: extensions we usually add to the base layer functionality and primitive types provided by the [Swift standard library](https://https://www.swift.org/documentation/#standard-library);
 * `Dependencies`: a ready-to-use, simple [Dependency Injection](https://en.wikipedia.org/wiki/Dependency_injection) mechanism that levers heavily on the [dynamic property wrappers](https://www.hackingwithswift.com/plus/intermediate-swiftui/creating-a-custom-property-wrapper-using-dynamicproperty) provided by the [Swift programming language](https://docs.swift.org/swift-book/documentation/the-swift-programming-language/properties/#Projecting-a-Value-From-a-Property-Wrapper);
 * `Persistence`: protocols, extensions and a ready-to-use fetcher class to simplify the building of the [CoreData](https://developer.apple.com/documentation/coredata) persistence layer;
+
+## Installation
+
+It is possible to add this package to other libraries and applications by adding it as a dependency in a `Package.swift` file or in a Xcode project, through the *Package dependencies* interface.
+
+This package has minimum platform requirements that are important to take into account:
+* *iOS 15.0 or higher*;
+* *macOS 12.0 or higher*;
+* *tvOS 15.0 or higher*;
+* *watchOS 8.0 or higher*.
+
+### Package file
+
+In the intended `Package.swift` file, it is required to add the following dependency:
+
+```swift
+dependencies: [
+    // ...
+    .package(url: "https://github.com/rock-n-code/swift-libs.git", from: "0.1.3")
+    // ...
+],
+```
+
+Then it is required to add the package to your target, like this:
+
+```swift
+targets: [
+    .target(
+        // ...
+        dependencies: [
+            .product(name: "SwiftLibs", package: "swift-libs")
+        ],
+        // ...
+    ),
+]
+```
+
+### Xcode 
+
+In an opened Xcode project, it is required to follow these steps to install the package:
+
+1. click on the Xcode project file in the sidebar to display *Project* and *Targets*;
+2. select the project under the *Project* section to show the *Info*, *Build Settings* and *Package Dependencies* options in the center menu just right on top;
+3. select the *Package Dependencies* option to show the defined dependencies of the project;
+4. press on the *+* (plus) button to add dependencies to the project;
+5. enter the URL `https://github.com/rock-n-code/swift-libs.git` into the *Search or Enter Package URL* located in the upper right corner;
+6. select the retrieved option;
+7. define the dependency rule (the *Up to Next Major Version* option and the *0.1.3* text are recommended);
+8. select the target to which the dependency will be applied (if required);
+9. wait for the package to be resolved and included in the project;
+10. now you should be ready to start using this package!
+
+### Other considerations
+
+This library is fully supported on Apple platforms only for the time being: *iOS*, *macOS*, *tvOS*, and *watchOS*. Support for other platforms such as *Linux* or *Windows* might be added in the future, depending on the type of changes those platforms require but this needs to be researched first. 
+
+⚠️ Please notice that this library only supports the [Swift Package Manager](https://www.swift.org/package-manager/), and that support for other dependency managers such as *Cocoapods* and *Carthage* has not been prioritised. 

Sources/Coordination/Protocols/Router.swift

@@ -10,7 +10,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-#if canImport(UIKit)
+#if canImport(UIKit) && !os(watchOS)
 import UIKit
 #endif
 
@@ -23,7 +23,7 @@ public protocol Router: AnyObject {
     
     // MARK: Functions
     
-    #if canImport(UIKit)
+    #if canImport(UIKit) && !os(watchOS)
     /// Present a view controller animatedly or not, depending on the given `animated` parameter, and also pass a closure that should be called on dismissal.
     /// - Parameters:
     ///   - viewController: A `UIViewController` view controller instance to present.
@@ -42,7 +42,7 @@ public protocol Router: AnyObject {
     
 }
 
-#if canImport(UIKit)
+#if canImport(UIKit) && !os(watchOS)
 // MARK: - Router+Implementations
 
 public extension Router {