Escape U+2028 and U+2029 when writing JSON as a JavaScript string literal.

U+2028 LINE SEPARATOR and U+2029 PARAGRAPH SEPARATOR are also not allowed in a JavaScript string literal. Trying to send a message with either would cause an "unexpected EOF" exception on the JavaScript side.

Author: nolanw

WebViewJavascriptBridge/WebViewJavascriptBridge.m

@@ -135,6 +135,8 @@ - (void)_dispatchMessage:(WVJBMessage*)message {
     messageJSON = [messageJSON stringByReplacingOccurrencesOfString:@"\n" withString:@"\\n"];
     messageJSON = [messageJSON stringByReplacingOccurrencesOfString:@"\r" withString:@"\\r"];
     messageJSON = [messageJSON stringByReplacingOccurrencesOfString:@"\f" withString:@"\\f"];
+    messageJSON = [messageJSON stringByReplacingOccurrencesOfString:@"\u2028" withString:@"\\u2028"];
+    messageJSON = [messageJSON stringByReplacingOccurrencesOfString:@"\u2029" withString:@"\\u2029"];
 
     NSString* javascriptCommand = [NSString stringWithFormat:@"WebViewJavascriptBridge._handleMessageFromObjC('%@');", messageJSON];
     if ([[NSThread currentThread] isMainThread]) {