Update swift-argument-parser to 0.2.0

Author: owenv

Package.resolved

@@ -75,7 +75,7 @@ if ProcessInfo.processInfo.environment["SWIFTCI_USE_LOCAL_DEPS"] == nil {
   package.dependencies += [
     .package(url: "https://github.com/apple/swift-tools-support-core.git", .branch("master")),
     .package(url: "https://github.com/jpsim/Yams.git", .branch("master")),
-    .package(url: "https://github.com/apple/swift-argument-parser.git", .exact("0.0.6"))
+    .package(url: "https://github.com/apple/swift-argument-parser.git", .exact("0.2.0"))
     ]
 } else {
     package.dependencies += [

Package.swift

@@ -16,13 +16,12 @@ extension DriverKind: ExpressibleByArgument {}
 
 struct SwiftHelp: ParsableCommand {
   @ArgumentParser.Option(name: .customLong("tool", withSingleDash: true),
-                         default: .interactive,
                          help: "The tool to list options of")
-  var tool: DriverKind
+  var tool: DriverKind = .interactive
 
   @Flag(name: .customLong("show-hidden", withSingleDash: true),
         help: "List hidden (unsupported) options")
-  var showHidden: Bool
+  var showHidden: Bool = false
 
   func run() throws {
     let driverOptionTable = OptionTable()