fix remove demo for tabs

package.json

@@ -55,7 +55,7 @@
     "rc-steps": "~1.3.2",
     "rc-switch": "~1.2.0",
     "rc-table": "~3.2.0",
-    "rc-tabs": "~5.4.1",
+    "rc-tabs": "~5.4.2",
     "rc-tooltip": "~3.0.1",
     "rc-tree": "~0.16.2",
     "rc-upload": "~1.6.4",