types: using unknown instead of any (#8152)

* types: using unknown instead of any

* chore: UnknownProp

src/field/index.tsx

@@ -18,6 +18,7 @@ import {
   isObject,
   isPromise,
   isFunction,
+  UnknownProp,
   resetScroll,
   formatNumber,
   preventDefault,
@@ -60,7 +61,7 @@ export default createComponent({
     formatter: Function as PropType<(value: string) => string>,
     maxlength: [Number, String],
     labelWidth: [Number, String],
-    labelClass: null as any,
+    labelClass: UnknownProp,
     labelAlign: String as PropType<FieldTextAlign>,
     inputAlign: String as PropType<FieldTextAlign>,
     placeholder: String,