Bug fix: '+' issue

The code for '+' is 'NarrowBar-NarrowSpace-WideBar-NarrowSpace-WideBar-NarrowSpace-WideBar'.
So the corresponding sequence should be '1011011011', but it was '101100110011'.

Author: tetsutalow

src/barcodes/codabar/index.js

@@ -51,7 +51,7 @@ class codabar extends Barcode{
 			":": "1101011011",
 			"/": "1101101011",
 			".": "1101101101",
-			"+": "101100110011",
+			"+": "1011011011",
 			"A": "1011001001",
 			"B": "1001001011",
 			"C": "1010010011",