Added swift package manager support (#1)

* Added swift package manager support

* Restrict platform to watchOS version 3.0

* Fix package syntax

* Specify library type to dynamic

* Try copying resources

* Specify resource file instead of folder

* Copy all resources

* Try without resources

* Move back to static library

* Try processing resources

* Try again dynamic again

* Avoid importing watch kit on iOS. Revert type dynamic

* Fix watch kit import

* Use swift package bundle

EMTLoadingIndicator/Classes/EMTLoadingIndicator.swift

@@ -6,7 +6,9 @@
 //
 
 import UIKit
+#if !os(iOS)
 import WatchKit
+#endif
 
 @objc
 final public class EMTLoadingIndicator: NSObject {
@@ -61,7 +63,11 @@ final public class EMTLoadingIndicator: NSObject {
 
     private func prepareImagesForWaitStyleDot() {
         if EMTLoadingIndicator.dotWaitImage == nil {
+            #if SWIFT_PACKAGE
+            let bundle = Bundle.module
+            #else
             let bundle = Bundle(for: EMTLoadingIndicator.self)
+            #endif
             let cursors: [UIImage] = (0...29).map {
                 let index = $0
                 return UIImage(contentsOfFile: (bundle.path(forResource: "waitIndicatorGraphic-\(index)@2x", ofType: "png"))!)!

EMTLoadingIndicator/Classes/EMTTimer.swift

@@ -5,7 +5,9 @@
 //  Copyright (C) 2016 emotionale. All rights reserved.
 //
 
+#if !os(iOS)
 import WatchKit
+#endif
 
 typealias EMTTimerCallback = (Timer) -> Void
 

Package.swift

@@ -0,0 +1,22 @@
+// swift-tools-version:5.3
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+import PackageDescription
+
+let package = Package(
+    name: "EMTLoadingIndicator",
+    platforms: [
+        .watchOS(.v3)
+    ],
+    products: [
+        .library(
+            name: "EMTLoadingIndicator",
+            targets: ["EMTLoadingIndicator"])
+    ],
+    targets: [
+        .target(
+            name: "EMTLoadingIndicator",
+            path: ".",
+            sources: ["EMTLoadingIndicator/Classes"],
+            resources: [.process("EMTLoadingIndicator/Resources")])
+    ]
+)