feat(RES-34): Fix plist font filename (#14)

Reviewed-on: #14

Sources/ResgenSwift/Generate/Parser/ConfigurationFileParser.swift

@@ -8,14 +8,15 @@
 import Foundation
 import Yams
 
-class ConfigurationFileParser {
+enum ConfigurationFileParser {
+
     static func parse(_ configurationFile: String) -> ConfigurationFile {
         guard let data = FileManager().contents(atPath: configurationFile) else {
             let error = GenerateError.fileNotExists(configurationFile)
             print(error.description)
             Generate.exit(withError: error)
         }
-        
+
         do {
             return try YAMLDecoder().decode(ConfigurationFile.self, from: data)
         } catch {