fix(calendar): no word length limit for months

BREAKING CHANGE: When entering a date using words, calendar only considers the first 3 letters of the month, which in most languages is probably sufficient, but not in french. As a result juillet (july) is always interpreted as juin (june).
It's also an issue for many other languages according to https://library.princeton.edu/departments/tsd/katmandu/reference/months.html

Closes #1026

src/definitions/modules/calendar.js

@@ -1304,8 +1304,11 @@ $.fn.calendar.settings = {
       var isTimeOnly = settings.type === 'time';
       var isDateOnly = settings.type.indexOf('time') < 0;
 
-      var words = text.split(settings.regExp.dateWords);
-      var numbers = text.split(settings.regExp.dateNumbers);
+      var words = text.split(settings.regExp.dateWords), word;
+      var numbers = text.split(settings.regExp.dateNumbers), number;
+
+      var parts;
+      var monthString;
 
       if (!isDateOnly) {
         //am/pm
@@ -1314,10 +1317,10 @@ $.fn.calendar.settings = {
 
         //time with ':'
         for (i = 0; i < numbers.length; i++) {
-          var number = numbers[i];
+          number = numbers[i];
           if (number.indexOf(':') >= 0) {
             if (hour < 0 || minute < 0) {
-              var parts = number.split(':');
+              parts = number.split(':');
               for (k = 0; k < Math.min(2, parts.length); k++) {
                 j = parseInt(parts[k]);
                 if (isNaN(j)) {
@@ -1338,14 +1341,13 @@ $.fn.calendar.settings = {
       if (!isTimeOnly) {
         //textual month
         for (i = 0; i < words.length; i++) {
-          var word = words[i];
+          word = words[i];
           if (word.length <= 0) {
             continue;
           }
-          word = word.substring(0, Math.min(word.length, 3));
           for (j = 0; j < settings.text.months.length; j++) {
-            var monthString = settings.text.months[j];
-            monthString = monthString.substring(0, Math.min(word.length, Math.min(monthString.length, 3))).toLowerCase();
+            monthString = settings.text.months[j];
+            monthString = monthString.substring(0, word.length).toLowerCase();
             if (monthString === word) {
               month = j + 1;
               break;