Updated swift version

.travis.yml

@@ -1,4 +1,4 @@
-osx_image: xcode9
+osx_image: xcode11.1
 language: objective-c
 env:
   global:

Zip.podspec

@@ -10,7 +10,7 @@ Pod::Spec.new do |s|
   s.name             = "Zip"
   s.version          = "1.1.0"
   s.summary          = "Zip and unzip files in Swift."
-  s.swift_version    = "4.2"
+  s.swift_version    = "5.0"
 
 # This description is used to generate tags and improve search results.
 #   * Think: What does it do? Why did you write it? What is the focus?

Zip.xcodeproj/project.pbxproj

@@ -359,20 +359,21 @@
 					};
 					347E3A731C1DFFB500A11FD3 = {
 						CreatedOnToolsVersion = 7.2;
-						LastSwiftMigration = 0900;
+						LastSwiftMigration = 1110;
 					};
 					347E3A7D1C1DFFB500A11FD3 = {
 						CreatedOnToolsVersion = 7.2;
-						LastSwiftMigration = 0900;
+						LastSwiftMigration = 1110;
 					};
 				};
 			};
 			buildConfigurationList = 347E3A6E1C1DFFB500A11FD3 /* Build configuration list for PBXProject "Zip" */;
 			compatibilityVersion = "Xcode 3.2";
-			developmentRegion = English;
+			developmentRegion = en;
 			hasScannedForEncodings = 0;
 			knownRegions = (
 				en,
+				Base,
 			);
 			mainGroup = 347E3A6A1C1DFFB500A11FD3;
 			productRefGroup = 347E3A751C1DFFB500A11FD3 /* Products */;
@@ -765,6 +766,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_INCLUDE_PATHS = "${SRCROOT}/Zip/minizip/**";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -788,6 +790,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_INCLUDE_PATHS = "${SRCROOT}/Zip/minizip/**";
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};
@@ -799,6 +802,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.roymarmelstein.ZipTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -811,6 +815,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.roymarmelstein.ZipTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};