feat: [sc-29033] drop Package.resolved (#348)

## Description

We are dropping `Package.resolved` in favor of running CI jobs across
multiple swift versions.

## How Has This Been Tested?

Please describe the tests that you ran to verify your changes. 

## Minimal checklist:

- [ ] I have performed a self-review of my own code 
- [ ] I have added `DocC` code-level documentation for any public
interfaces exported by the package
- [ ] I have added unit and/or integration tests that prove my fix is
effective or that my feature works

Author: supersonicbyte

Package.resolved

@@ -23,7 +23,7 @@ let package = Package(
     ],
     dependencies: [
         .package(url: "https://github.com/apple/swift-system.git", .upToNextMajor(from: "1.1.0")),
-        .package(url: "https://github.com/apple/swift-argument-parser.git", .upToNextMajor(from: "1.1.0")),
+        .package(url: "https://github.com/apple/swift-argument-parser.git", "1.1.0" ..< "1.6.0"),
         .package(url: "https://github.com/ordo-one/TextTable.git", .upToNextMajor(from: "0.0.1")),
         .package(url: "https://github.com/HdrHistogram/hdrhistogram-swift.git", .upToNextMajor(from: "0.1.4")),
         .package(url: "https://github.com/apple/swift-atomics.git", .upToNextMajor(from: "1.0.0")),