Set macOS 10.13 as minimum platform target

Author: mattt

Package.swift

@@ -5,6 +5,9 @@ import PackageDescription
 
 let package = Package(
     name: "swift-doc",
+    platforms: [
+        .macOS(.v10_13)
+    ],
     products: [
         .executable(name: "swift-doc", targets: ["swift-doc"]),
         .library(name: "SwiftDoc", targets: ["SwiftDoc"])

Tests/EndToEndTests/EndToEndTests.swift

@@ -10,11 +10,7 @@ final class EndToEndTests: XCTestCase {
     let pipe = Pipe()
     process.standardOutput = pipe
 
-    if #available(OSX 10.13, *) {
-      try process.run()
-    } else {
-      process.launch()
-    }
+    try process.run()
     process.waitUntilExit()
 
     let data = pipe.fileHandleForReading.readDataToEndOfFile()