Add SPM support

.gitignore

@@ -1,6 +1,8 @@
 # Xcode
 #
 build/
+.build/
+.swiftpm/
 *.pbxuser
 !default.pbxuser
 *.mode1v3

Package.swift

@@ -0,0 +1,28 @@
+// swift-tools-version: 5.6
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "MBCircularProgressBar",
+    products: [
+        // Products define the executables and libraries a package produces, and make them visible to other packages.
+        .library(
+            name: "MBCircularProgressBar",
+            targets: ["MBCircularProgressBar"]),
+    ],
+    dependencies: [
+        // Dependencies declare other packages that this package depends on.
+        // .package(url: /* package url */, from: "1.0.0"),
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages this package depends on.
+        .target(
+            name: "MBCircularProgressBar",
+            dependencies: [],
+            path: "Pod/Classes",
+            publicHeadersPath: "."
+        )
+    ]
+)