style: fix datepicker disabled color (#2222)

xrkffgg · web-flow · commit 1d446c3c3e3b · 2020-05-11T21:49:02.000+08:00
diff --git a/components/date-picker/style/RangePicker.less b/components/date-picker/style/RangePicker.less
@@ -23,6 +23,9 @@
   text-align: center;
   vertical-align: top;
   pointer-events: none;
+  .@{ant-prefix}-input-disabled & {
+    color: @disabled-color;
+  }
 }
 
 .@{calendar-prefix-cls}-range {
