Fixed yearPicker bug

Author: ManukMinasyan

package.json

@@ -6,7 +6,7 @@
   },
   "name": "vue-functional-calendar",
   "description": "Lightweight, high-performance calendar component based on Vue.js",
-  "version": "2.6.4",
+  "version": "2.6.5",
   "license": "MIT",
   "repository": {
     "type": "git",

src/components/FunctionalCalendar.vue

@@ -797,7 +797,7 @@
             pickYear(year) {
                 this.showYearPicker = false;
                 let date = this.calendar.currentDate;
-                this.calendar.currentDate = new Date(year, date.getMonth(), 0);
+                this.calendar.currentDate = new Date(year, date.getMonth() + 1, 0);
                 this.initCalendar();
             },
             getClassNames(day) {