Add support for Cuckoo runtime 0.4.0.

Author: TadeasKriz

Source/CuckooGeneratorFramework/CuckooRuntimeVersion.swift

@@ -9,31 +9,32 @@
 import Commandant
 
 public enum CuckooRuntimeVersion: String {
-    public static let latest: CuckooRuntimeVersion = .v0_3_0
-    public static let all: [CuckooRuntimeVersion] = [.v0_1_0, .v0_3_0]
-    
+    public static let latest: CuckooRuntimeVersion = .v0_4_0
+    public static let all: [CuckooRuntimeVersion] = [.v0_1_0, .v0_3_0, .v0_4_0]
+
     case v0_1_0 = "0.1.0"
     case v0_3_0 = "0.3.0"
-    
+    case v0_4_0 = "0.4.0"
+
     public var generator: Generator.Type {
         switch self {
         case .v0_1_0:
             return Generator_r1.self
-        case .v0_3_0:
+        case .v0_3_0, .v0_4_0:
             return Generator_r2.self
         }
     }
-    
+
     public var tokenizer: Tokenizer.Type {
         switch self {
-        case .v0_1_0, .v0_3_0:
+        case .v0_1_0, .v0_3_0, v0_4_0:
             return Tokenizer_r1.self
         }
     }
-    
+
     public var fileHeaderHandler: FileHeaderHandler.Type {
         switch self {
-        case .v0_1_0, .v0_3_0:
+        case .v0_1_0, .v0_3_0, v0_4_0:
             return FileHeaderHandler_r1.self
         }
     }
@@ -47,8 +48,8 @@ extension CuckooRuntimeVersion: CustomStringConvertible {
 
 extension CuckooRuntimeVersion: ArgumentType {
     public static let name: String = "Mockery runtime version"
-    
+
     public static func fromString(string: String) -> CuckooRuntimeVersion? {
         return CuckooRuntimeVersion(rawValue: string)
     }
-}
+}