Fixed languageCode issue on iOS 9 or lower

CedarMaps.podspec

@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'CedarMaps'
-  s.version          = '2.0.2'
+  s.version          = '2.1.1'
   s.summary          = 'CedarMaps iOS SDK'
 
 # This description is used to generate tags and improve search results.

CedarMaps/Classes/CSMapKit.m

@@ -339,8 +339,16 @@ typedef enum {
     if (pointsStr.length > 0) {
         urlStr = [urlStr stringByAppendingString:pointsStr];
     }
-    if (locale.languageCode) {
-        urlStr = [urlStr stringByAppendingFormat:@"?instructions=%@&locale=%@", shouldGetInstructions ? @"true" : @"false", locale.languageCode];
+    
+    NSString *languageCode;
+    if (@available(iOS 10, *)) {
+        languageCode = locale.languageCode;
+    } else {
+        languageCode = [locale objectForKey:NSLocaleLanguageCode]
+    }
+    
+    if (languageCode) {
+        urlStr = [urlStr stringByAppendingFormat:@"?instructions=%@&locale=%@", shouldGetInstructions ? @"true" : @"false", languageCode];
     }
     
     __weak CSMapKit *weakSelf = self;