Update SwiftLint and fix some Swift 6 issues

Package.resolved

@@ -1,4 +1,5 @@
 {
+  "originHash" : "fae67d9ce14b6664edc4151ad1a55b74d50d7281499f09eeca50b0376d0f837f",
   "pins" : [
     {
       "identity" : "swift-argument-parser",
@@ -14,8 +15,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/lukepistrol/SwiftLintPlugin",
       "state" : {
-        "revision" : "87454f5c9ff4d644086aec2a0df1ffba678e7f3c",
-        "version" : "0.57.1"
+        "revision" : "8e785a9801fc7961fef3d41ccb81acb3bd3d9735",
+        "version" : "0.60.0"
       }
     },
     {
@@ -28,5 +29,5 @@
       }
     }
   ],
-  "version" : 2
+  "version" : 3
 }

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:5.9
+// swift-tools-version:6.1
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
@@ -18,7 +18,7 @@ let package = Package(
         ),
         .package(
             url: "https://github.com/lukepistrol/SwiftLintPlugin",
-            exact: "0.57.1"
+            exact: "0.60.0"
         ),
     ],
     targets: [

Sources/ResgenSwift/Analytics/Analytics.swift

@@ -13,7 +13,7 @@ struct Analytics: ParsableCommand {
 
     // MARK: - Command Configuration
 
-    static var configuration = CommandConfiguration(
+    static let configuration = CommandConfiguration(
         abstract: "Generate analytics extension file.",
         version: ResgenSwiftVersion
     )

Sources/ResgenSwift/Fonts/Fonts.swift

@@ -13,7 +13,7 @@ struct Fonts: ParsableCommand {
 
     // MARK: - CommandConfiguration
 
-    static var configuration = CommandConfiguration(
+    static let configuration = CommandConfiguration(
         abstract: "A utility to generate an helpful etension to access your custom font from code and also Info.plist UIAppsFont content.",
         version: ResgenSwiftVersion
     )

Sources/ResgenSwift/Generate/Generate.swift

@@ -13,7 +13,7 @@ struct Generate: ParsableCommand {
 
     // MARK: - CommandConfiguration
 
-    static var configuration = CommandConfiguration(
+    static let configuration = CommandConfiguration(
         abstract: "A utility to generate ressources based on a configuration file",
         version: ResgenSwiftVersion
     )

Sources/ResgenSwift/Images/Images.swift

@@ -13,7 +13,7 @@ struct Images: ParsableCommand {
 
     // MARK: - CommandConfiguration
 
-    static var configuration = CommandConfiguration(
+    static let configuration = CommandConfiguration(
         abstract: "A utility for generate images and an extension to access them easily.",
         version: ResgenSwiftVersion
     )

Sources/ResgenSwift/Strings/Stringium/Stringium.swift

@@ -13,7 +13,7 @@ struct Stringium: ParsableCommand {
 
     // MARK: - Command Configuration
 
-    static var configuration = CommandConfiguration(
+    static let configuration = CommandConfiguration(
         abstract: "Generate strings with custom scripts.",
         version: ResgenSwiftVersion
     )

Sources/ResgenSwift/Strings/Strings.swift

@@ -11,7 +11,7 @@ import ToolCore
 
 struct Strings: ParsableCommand {
 
-    static var configuration = CommandConfiguration(
+    static let configuration = CommandConfiguration(
         abstract: "A utility for generate strings.",
         version: ResgenSwiftVersion,
 

Sources/ResgenSwift/Strings/Tag/Tags.swift

@@ -13,7 +13,7 @@ struct Tags: ParsableCommand {
 
     // MARK: - Command Configuration
 
-    static var configuration = CommandConfiguration(
+    static let configuration = CommandConfiguration(
         abstract: "Generate tags extension file.",
         version: ResgenSwiftVersion
     )

Sources/ResgenSwift/Strings/Twine/Twine.swift

@@ -13,7 +13,7 @@ struct Twine: ParsableCommand {
 
     // MARK: - Command Configuration
 
-    static var configuration = CommandConfiguration(
+    static let configuration = CommandConfiguration(
         abstract: "Generate strings with twine.",
         version: ResgenSwiftVersion
     )

Sources/ResgenSwift/main.swift

@@ -11,7 +11,7 @@ import ToolCore
 
 struct ResgenSwift: ParsableCommand {
 
-    static var configuration = CommandConfiguration(
+    static let configuration = CommandConfiguration(
         abstract: "A utility for generate ressources.",
         version: ResgenSwiftVersion,