添加SPM支持

Author: lixiang1994

.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

AutoInch.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,28 @@
+// 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: "AutoInch",
+    platforms: [.iOS(.v9)],
+    products: [
+        // Products define the executables and libraries a package produces, and make them visible to other packages.
+        .library(
+            name: "AutoInch",
+            targets: ["AutoInch"]),
+    ],
+    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: "AutoInch",
+            dependencies: [],
+            path: "Sources"
+        )
+    ]
+)

AutoInch.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,11 @@
+    import XCTest
+    @testable import AutoInch
+
+    final class AutoInchTests: XCTestCase {
+        func testExample() {
+            // This is an example of a functional test case.
+            // Use XCTAssert and related functions to verify your tests produce the correct
+            // results.
+            XCTAssertEqual(AutoInch().text, "Hello, World!")
+        }
+    }