New gantt bar config property: pushOnOverlap

If explicitly set to false while g-gantt-chart's pushOnOverlap is true, pushing behavior will be ignored for the bar where it's specified

package.json

@@ -1,6 +1,6 @@
 {
   "name": "vue-ganttastic",
-  "version": "0.9.15",
+  "version": "0.9.16",
   "description": "A simple and customizable Gantt chart component for Vue.js",
   "repository": {
     "type": "git",

src/GGanttBar.vue

@@ -288,7 +288,7 @@ export default {
     },
 
     manageOverlapping(){
-      if(!this.ganttChartProps.pushOnOverlap){
+      if(!this.ganttChartProps.pushOnOverlap || this.barConfig.pushOnOverlap === false){
         return
       }
       let currentBar = this.bar
@@ -325,7 +325,7 @@ export default {
       let barEndMoment = moment(bar[this.barEnd])
       let overlapLeft, overlapRight, overlapInBetween
       let overlapBar = this.allBarsInRow.find(otherBar => {
-        if(otherBar === bar){
+        if(otherBar === bar || otherBar.ganttBarConfig.pushOnOverlap === false){
           return false
         }
         let otherBarStart = moment(otherBar[this.barStart])

src/GGanttChart.vue

@@ -128,7 +128,7 @@ export default {
     },
 
     shouldSnapBackBar(ganttBar){
-      if(this.snapBackOnOverlap){
+      if(this.snapBackOnOverlap && ganttBar.barConfig.pushOnOverlap !== false){
         let {overlapBar} = ganttBar.getOverlapBarAndType(ganttBar.bar)
         return !!overlapBar
       }