Merge pull request #519 from ahoppen/ahoppen/5.8/argument-parser-dependency

[5.8] Relax version requirement for swift-argument-parser

Author: DougGregor

Package.swift

@@ -215,7 +215,7 @@ if ProcessInfo.processInfo.environment["SWIFTCI_USE_LOCAL_DEPS"] == nil {
   package.dependencies += [
     .package(
       url: "https://github.com/apple/swift-argument-parser.git",
-      Version("1.0.1")..<Version("1.2.0")
+      from: "1.0.1"
     ),
     .package(
       url: "https://github.com/apple/swift-syntax.git",