Fix conversion of String->Int dictionary

Sources/Jay/NativeTypeConversions.swift

@@ -75,6 +75,10 @@ struct NativeTypeConverter {
     func parseNSArray(_ array: NSArray) throws -> JSON? {
         return try self.convertArray(array.map { $0 as Any })
     }
+
+    func parseArray(_ array: [Any]) throws -> JSON? {
+        return try self.convertArray(array)
+    }
 
     func parseNSDictionary(_ dict: NSDictionary) throws -> JSON? {
         var dOut = [String: Any]()
@@ -88,6 +92,10 @@ struct NativeTypeConverter {
         }
         return try self.dictionaryToJayType(dOut)
     }
+
+    func parseDictionary(_ dict: [String: Any]) throws -> JSON? {
+        return try self.dictionaryToJayType(dict)
+    }
 
     func arrayToJayType(_ maybeArray: Any) throws -> JSON? {
 
@@ -126,13 +134,31 @@ struct NativeTypeConverter {
         guard let json = js else { return .null }
         if json is NSNull { return .null }
 
+        if let nativeDict = json as? [String: Any] {
+            guard let dict = try self.parseDictionary(nativeDict) else {
+                throw JayError.unsupportedType(nativeDict)
+            }
+            return dict
+        }
+
+        // On OS X, this check also succeeds for [:] dicts, so this check needs
+        // to come after the previous one.
         if let nsdict = json as? NSDictionary {
             guard let dict = try self.parseNSDictionary(nsdict) else {
                 throw JayError.unsupportedType(nsdict)
             }
             return dict
         }
+
+        if let nativeArray = json as? [Any] {
+            guard let array = try self.parseArray(nativeArray) else {
+                throw JayError.unsupportedType(nativeArray)
+            }
+            return array
+        }
 
+        // On OS X, this check also succeeds for [] arrays, so this check needs
+        // to come after the previous one.
         if let nsarray = json as? NSArray {
             guard let array = try self.parseNSArray(nsarray) else {
                 throw JayError.unsupportedType(nsarray)

Tests/JayTests/FormattingTests.swift

@@ -17,6 +17,7 @@ extension FormattingTests {
         ("testNSDictionary_Empty", testNSDictionary_Empty),
         ("testNSDictionary_Simple", testNSDictionary_Simple),
         ("testObject_Simple", testObject_Simple),
+        ("testObject_StringInt", testObject_StringInt),
         ("testObject_Normal", testObject_Normal),
         ("testObject_Nested", testObject_Nested),
         ("testObject_AllTypes", testObject_AllTypes),
@@ -70,6 +71,12 @@ class FormattingTests: XCTestCase {
         let data = try! Jay().dataFromJson(any: json)
         XCTAssertEqual(data, "{\"hello\":\"world\"}".chars())
     }
+
+    func testObject_StringInt() {
+        let json = ["hello": 42]
+        let data = try! Jay().dataFromJson(any: json)
+        XCTAssertEqual(String(bytes: data, encoding: String.Encoding.utf8)!, "{\"hello\":42}")
+    }
 
     func testObject_Normal() {
         let json: JSON = [