Add Swiftlint

Sources/ResgenSwift/Colors/Generator/ColorExtensionGenerator.swift

@@ -30,7 +30,7 @@ struct ColorExtensionGenerator {
         let extensionFilePathURL = URL(fileURLWithPath: extensionFilePath)
         do {
             try extensionContent.write(to: extensionFilePathURL, atomically: false, encoding: .utf8)
-        } catch (let error) {
+        } catch let error {
             let error = ColorsToolError.writeExtension(extensionFilePath, error.localizedDescription)
             print(error.description)
             Colors.exit(withError: error)

Sources/ResgenSwift/Colors/Generator/ColorXcassetHelper.swift

@@ -38,7 +38,7 @@ struct ColorXcassetHelper {
         let contentsJsonPathURL = URL(fileURLWithPath: contentsJsonPath)
         do {
             try color.contentsJSON().write(to: contentsJsonPathURL, atomically: false, encoding: .utf8)
-        } catch (let error) {
+        } catch let error {
             let error = ColorsToolError.writeAsset(error.localizedDescription)
             print(error.description)
             Colors.exit(withError: error)