ColorPicker: add active-change event

examples/docs/en-US/color-picker.md

@@ -94,3 +94,4 @@ ColorPicker is a color selector supporting multiple color formats.
 | Event Name | Description | Parameters |
 |---------|--------|---------|
 | change | triggers when input value changes | color value |
+| active-change | triggers when the current active color changes | active color value |

examples/docs/zh-CN/color-picker.md

@@ -94,3 +94,4 @@
 | 事件名称      | 说明    | 回调参数      |
 |---------- |-------- |---------- |
 | change | 当绑定值变化时触发 | 当前值 |
+| active-change | 面板中当前显示的颜色发生改变时触发 | 当前显示的颜色值 |

packages/color-picker/src/main.vue

@@ -70,6 +70,9 @@
         handler() {
           this.showPanelColor = true;
         }
+      },
+      displayedColor(val) {
+        this.$emit('active-change', val);
       }
     },
 

packages/switch/src/component.vue

@@ -40,7 +40,7 @@
     props: {
       value: {
         type: [Boolean, String, Number],
-        default: true
+        default: false
       },
       disabled: {
         type: Boolean,