fix 'undefined' when using empty string delimiter (nosir#578)

* fix 'undefined' prefix when using empty string delimiter

* run publish

Author: maxim-c

dist/cleave-angular.js

@@ -1490,7 +1490,7 @@ return /******/ (function(modules) { // webpackBootstrap
 	    getFormattedValue: function (value, blocks, blocksLength, delimiter, delimiters, delimiterLazyShow) {
 	        var result = '',
 	            multipleDelimiters = delimiters.length > 0,
-	            currentDelimiter;
+	            currentDelimiter = '';
 
 	        // no options, normal input
 	        if (blocksLength === 0) {

dist/cleave-angular.min.js

@@ -832,7 +832,7 @@ var Util = {
     getFormattedValue: function (value, blocks, blocksLength, delimiter, delimiters, delimiterLazyShow) {
         var result = '',
             multipleDelimiters = delimiters.length > 0,
-            currentDelimiter;
+            currentDelimiter = '';
 
         // no options, normal input
         if (blocksLength === 0) {

dist/cleave-esm.js

@@ -2660,7 +2660,7 @@ return /******/ (function(modules) { // webpackBootstrap
 	    getFormattedValue: function getFormattedValue(value, blocks, blocksLength, delimiter, delimiters, delimiterLazyShow) {
 	        var result = '',
 	            multipleDelimiters = delimiters.length > 0,
-	            currentDelimiter;
+	            currentDelimiter = '';
 
 	        // no options, normal input
 	        if (blocksLength === 0) {

dist/cleave-esm.min.js

@@ -2854,7 +2854,7 @@ return /******/ (function(modules) { // webpackBootstrap
 	    getFormattedValue: function getFormattedValue(value, blocks, blocksLength, delimiter, delimiters, delimiterLazyShow) {
 	        var result = '',
 	            multipleDelimiters = delimiters.length > 0,
-	            currentDelimiter;
+	            currentDelimiter = '';
 
 	        // no options, normal input
 	        if (blocksLength === 0) {

dist/cleave-react-node.js

@@ -1433,7 +1433,7 @@ return /******/ (function(modules) { // webpackBootstrap
 	    getFormattedValue: function (value, blocks, blocksLength, delimiter, delimiters, delimiterLazyShow) {
 	        var result = '',
 	            multipleDelimiters = delimiters.length > 0,
-	            currentDelimiter;
+	            currentDelimiter = '';
 
 	        // no options, normal input
 	        if (blocksLength === 0) {