fix default value not accepting string type

Author: kevinongko

package.json

@@ -1,6 +1,6 @@
 {
   "name": "vue-numeric",
-  "version": "1.5.0",
+  "version": "1.5.1",
   "description": "Input field component to display currency value based on Vue.",
   "author": "Kevin Ongko",
   "main": "src/vue-numeric.vue",

src/vue-numeric.vue

@@ -236,13 +236,13 @@ export default {
   mounted () {
     // Check default value from parent v-model.
     if (this.value) {
-      this.processValue(this.value)
+      this.processValue(this.formatToNumber(this.value))
       this.formatValue(this.value)
     }
 
     // In case of delayed v-model new value.
     setTimeout(() => {
-      this.processValue(this.value)
+      this.processValue(this.formatToNumber(this.value))
       this.formatValue(this.value)
     }, 500)
   }