Set Swift argument parser version to 1.2.1. (#17)

Task/Issue URL: https://app.asana.com/0/0/1204360441340374/f
Tech Design URL:
CC:

Description:

This PR updates the Swift Argument Parser version, ahead of adding a SwiftLint package plugin to BSK. Right now, SwiftLint and TRK aren't compatible due to this resolution conflict.

Package.resolved

@@ -6,8 +6,8 @@
         "repositoryURL": "https://github.com/apple/swift-argument-parser",
         "state": {
           "branch": null,
-          "revision": "986d191f94cec88f6350056da59c2e59e83d1229",
-          "version": "0.4.3"
+          "revision": "fee6933f37fde9a5e12a1e4aeaa93fe60116ff2a",
+          "version": "1.2.2"
         }
       }
     ]

Package.swift

@@ -28,7 +28,7 @@ let package = Package(
             targets: ["TrackerRadarKit"])
     ],
     dependencies: [
-        .package(url: "https://github.com/apple/swift-argument-parser", from: "0.4.3")
+        .package(url: "https://github.com/apple/swift-argument-parser", from: "1.2.1")
     ],
     targets: [
         .target(