fix：限制最小可缩宽度

lib/pen.js

@@ -343,6 +343,9 @@ export default class Painter {
     view.rect.top = view.rect.top - pd[0];
     view.rect.right = view.rect.right + pd[1];
     view.rect.bottom = view.rect.bottom + pd[2];
+    if (view.type === 'text') {
+      view.rect.minWidth = view.css.fontSize.toPx() + pd[1] + pd[3];
+    }
 
     this.ctx.rotate(angle);
     if (!notClip && view.css && view.css.borderRadius && view.type !== 'rect') {

painter.js

@@ -462,6 +462,16 @@ Component({
       let css = {}
       if (this.isScale) {
         const newW = this.startW + offsetX > 1 ? this.startW + offsetX : 1
+        if (this.touchedView.css && this.touchedView.css.minWidth) {
+          if (newW < this.touchedView.css.minWidth.toPx()) {
+            return
+          }
+        }
+        if (this.touchedView.rect && this.touchedView.rect.minWidth) {
+          if (newW < this.touchedView.rect.minWidth) {
+            return
+          }
+        }
         const newH = this.startH + offsetY > 1 ? this.startH + offsetY : 1
         css = {
           width: `${newW}px`,