Add missing CFBundleVersion, bump version to 0.3.1 (#74)

Using carthage to either grab the latest prebuilt binary 0.3.0 or forcing carthage to build the latest XmlCoder results in the framework's plist missing a value for CFBundleVersion, which is required for AppStore Connect upload. Other plist keys are correctly filled in. I see it's using the $(CURRENT_PROJECT_VERSION) variable for CFBundleVersion.

> AppStore error: ERROR ITMS-90056: XMLCoder.framework is invalid. The Info.plist file is missing the required key: CFBundleVersion

Resolves #72

Author: MaxDesiatov

CHANGELOG.md

@@ -1,3 +1,13 @@
+#  0.3.1 (February 6, 2019)
+
+A bugfix release that adds missing `CFBundleVersion` in generated framework's 
+`Info.plist` ([#72](https://github.com/MaxDesiatov/XMLCoder/issues/72) reported by 
+[@stonedauwg](https://github.com/stonedauwg)).
+
+## Changes
+
+* Set `CURRENT_PROJECT_VERSION` in project file ([#74](https://github.com/MaxDesiatov/XMLCoder/pull/74), [@MaxDesiatov](https://github.com/MaxDesiatov))
+
 #  0.3.0 (January 22, 2019)
 
 A maintenance release focused on fixing bugs, improving error reporting and

README.md

@@ -72,7 +72,7 @@ target 'YourApp' do
   use_frameworks!
 
   # Pods for Test
-  pod 'XMLCoder', '~> 0.3.0'
+  pod 'XMLCoder', '~> 0.3.1'
 
 end
 ```
@@ -101,7 +101,7 @@ $ brew install carthage
 Inside of your `Cartfile`, add GitHub path to `XMLCoder`:
 
 ```ogdl
-github "MaxDesiatov/XMLCoder" ~> 0.3.0
+github "MaxDesiatov/XMLCoder" ~> 0.3.1
 ```
 
 Then, run the following command to build the framework:
@@ -124,7 +124,7 @@ easy as adding it to the `dependencies` value of your `Package.swift`.
 
 ```swift
 dependencies: [
-    .package(url: "https://github.com/MaxDesiatov/XMLCoder.git", from: "0.3.0")
+    .package(url: "https://github.com/MaxDesiatov/XMLCoder.git", from: "0.3.1")
 ]
 ```
 

Sources/XMLCoder/Auxiliaries/Box/KeyedBox.swift

@@ -1,6 +1,6 @@
 //
 //  KeyedBox.swift
-//  XMLCoderPackageDescription
+//  XMLCoder
 //
 //  Created by Vincent Esche on 11/19/18.
 //
@@ -12,6 +12,10 @@ struct KeyedStorage<Key: Hashable & Comparable, Value> {
 
     fileprivate var buffer: Buffer = [:]
 
+    var isEmpty: Bool {
+        return buffer.isEmpty
+    }
+
     var count: Int {
         return buffer.count
     }

Sources/XMLCoder/Decoder/XMLUnkeyedDecodingContainer.swift

@@ -94,7 +94,7 @@ struct XMLUnkeyedDecodingContainer: UnkeyedDecodingContainer {
         if let type = type as? AnyArray.Type,
             let keyedBox = container
             .withShared({ $0[self.currentIndex] as? KeyedBox }),
-            keyedBox.attributes.count == 0,
+            keyedBox.attributes.isEmpty,
             keyedBox.elements.count == 1,
             let firstKey = keyedBox.elements.keys.first,
             let unkeyedBox = keyedBox.elements[firstKey] {

XMLCoder.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name          = "XMLCoder"
-  s.version       = "0.3.0"
+  s.version       = "0.3.1"
   s.summary       = "XMLEncoder & XMLDecoder using the Codable protocol in Swift 4"
   s.description   = "XMLCoder allows Swift 4 Codable-conforming objects to be translated to and from XML"
   s.homepage      = "https://github.com/MaxDesiatov/XMLCoder"

XMLCoder.xcodeproj/project.pbxproj

@@ -654,6 +654,7 @@
 				CLANG_ENABLE_OBJC_ARC = YES;
 				COMBINE_HIDPI_IMAGES = YES;
 				COPY_PHASE_STRIP = NO;
+				CURRENT_PROJECT_VERSION = 0.3.1;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				ENABLE_NS_ASSERTIONS = YES;
@@ -683,6 +684,7 @@
 				CLANG_ENABLE_OBJC_ARC = YES;
 				COMBINE_HIDPI_IMAGES = YES;
 				COPY_PHASE_STRIP = YES;
+				CURRENT_PROJECT_VERSION = 0.3.1;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				GCC_OPTIMIZATION_LEVEL = s;