fix: 'xForm版本修复'

package.json

@@ -122,7 +122,7 @@
         "js-calendar-converter": "0.0.4",
         "lodash": "4.17.11",
         "minimist": "1.2.0",
-        "panda-xform": "^2.7.1",
+        "panda-xform": "2.7.1",
         "prop-types": "15.7.2",
         "quill": "^1.3.7",
         "rc-tween-one": "^3.0.6",