Update Ciphers.mjs

Added a method called getMultiTapMap() which takes the arguments of toggle{int} and space_delim {string}.
This function creates a dictionary for the Multi Tap Cipher Encoding Scheme.
If the toggle is 1, it returns the dictionary directly.
else it reverses the dictionary and returns it, enabling it to be used in the decode operation.

src/core/lib/Ciphers.mjs

@@ -65,6 +65,27 @@ export function genPolybiusSquare (keyword) {
     return polybius;
 }
 
+/**
+ * Generates a mapping for the MultiTap
+ *
+ * @private
+ * @author Necron3574 [kaustubhbm3574@gmail.com]
+ * @param {int,string} toggle - 1 for encode , 2 for decode, space_delim
+ * @returns {dict}
+ */
+export function getMultiTapMap (toggle,space_delim) {
+    var mapping = {"A" :"2","B":"22","C":"222","D":"3","E":"33","F":"333","G":"4","H":"44","I":"444","J":"5","K":"55","L":"555","M":"6","N":"66","O":"666","P":"7","Q":"77","R":"777","S":"7777","T":"8","U":"88","V":"888","W":"9","X":"99","Y":"999","Z":"9999"," ":space_delim};
+    if(toggle == 1)
+        return mapping;
+    else{
+        var ret = {};
+            for(var key in mapping){
+                ret[mapping[key]] = key;
+            }
+        return ret;
+    }
+}
+
 /**
  * A mapping of string formats to their classes in the CryptoJS library.
  *