Fix：修复关联线设置激活样式时控制线条颜色没同步更新的问题

README.md

@@ -541,4 +541,8 @@ const mindMap = new MindMap({
         <img src="./web/src/assets/avatar/Xavier.png" style="width: 50px;height: 50px;" />
         <span>Xavier</span>
     </span>
+    <span>
+        <img src="./web/src/assets/avatar/冒号括号.png" style="width: 50px;height: 50px;" />
+        <span>:)</span>
+    </span>
 </p>

simple-mind-map/src/plugins/AssociativeLine.js

@@ -370,6 +370,18 @@ class AssociativeLine {
           'font-size': associativeLineTextFontSize + 'px'
         })
     })
+    if (this.controlLine1) {
+      this.controlLine1.stroke({ color: associativeLineActiveColor })
+    }
+    if (this.controlLine2) {
+      this.controlLine2.stroke({ color: associativeLineActiveColor })
+    }
+    if (this.controlPoint1) {
+      this.controlPoint1.stroke({ color: associativeLineActiveColor })
+    }
+    if (this.controlPoint2) {
+      this.controlPoint2.stroke({ color: associativeLineActiveColor })
+    }
   }
 
   // 激活某根关联线