docs: layout.sync on all examples

Author: gmsa

website/docs/.vuepress/components/Example01Basic.vue

@@ -1,5 +1,5 @@
 <template>
-    <grid-layout :layout="layout"
+    <grid-layout :layout.sync="layout"
                  :col-num="12"
                  :row-height="30"
                  :is-draggable="draggable"

website/docs/.vuepress/components/Example02Events.vue

@@ -6,7 +6,7 @@
             </div>
         </div>
         <div style="margin-top:10px;">
-            <grid-layout :layout="layout"
+            <grid-layout :layout.sync="layout"
                          :col-num="12"
                          :row-height="30"
                          :is-draggable="draggable"

website/docs/.vuepress/components/Example03MultipleGrids.vue

@@ -2,7 +2,7 @@
     <div>
         <div style="margin-top:10px;">
             <h4>Grid #1</h4>
-            <grid-layout :layout="layout"
+            <grid-layout :layout.sync="layout"
                          :col-num="12"
                          :row-height="30"
                          :is-draggable="true"

website/docs/.vuepress/components/Example04AllowIgnore.vue

@@ -1,6 +1,6 @@
 <template>
     <div>
-        <grid-layout :layout="layout"
+        <grid-layout :layout.sync="layout"
                      :col-num="12"
                      :row-height="30"
                      :is-draggable="true"

website/docs/.vuepress/components/Example05Mirrored.vue

@@ -4,7 +4,7 @@
         <input type="checkbox" v-model="resizable"/> Resizable
         <input type="checkbox" v-model="mirrored"/> Mirrored
         <br/>
-        <grid-layout :layout="layout"
+        <grid-layout :layout.sync="layout"
                      :col-num="12"
                      :row-height="30"
                      :is-draggable="draggable"

website/docs/.vuepress/components/Example06Responsive.vue

@@ -14,7 +14,7 @@
         <input type="checkbox" v-model="responsive"/> Responsive
         <br/>
         <div style="width:100%;margin-top: 10px;height:100%;">
-            <grid-layout :layout="layout"
+            <grid-layout :layout.sync="layout"
                          :col-num="12"
                          :row-height="30"
                          :is-draggable="draggable"

website/docs/.vuepress/components/Example07PreventCollision.vue

@@ -1,6 +1,6 @@
 <template>
     <div>
-        <grid-layout :layout="layout"
+        <grid-layout :layout.sync="layout"
                      :col-num="12"
                      :row-height="30"
                      :is-draggable="draggable"

website/docs/.vuepress/components/Example09DynamicAddRemove.vue

@@ -11,7 +11,7 @@
         <button @click="addItem">Add an item dynamically</button>
         <input type="checkbox" v-model="draggable" /> Draggable
         <input type="checkbox" v-model="resizable" /> Resizable
-        <grid-layout :layout="layout"
+        <grid-layout :layout.sync="layout"
                      :col-num="colNum"
                      :row-height="30"
                      :is-draggable="draggable"

website/docs/.vuepress/components/ExampleStylingPlaceholder.vue

@@ -1,6 +1,6 @@
 <template>
     <div class="container">
-        <grid-layout :layout="layout"
+        <grid-layout :layout.sync="layout"
                      :col-num="12"
                      :row-height="30"
                      :is-draggable="draggable"

website/docs/.vuepress/components/HomepageGrid.vue

@@ -1,5 +1,5 @@
 <template>
-    <grid-layout :layout="layout"
+    <grid-layout :layout.sync="layout"
                  :col-num="12"
                  :row-height="30"
                  :is-draggable="draggable"