feat: provide dist files

package.json

@@ -1,6 +1,6 @@
 {
   "name": "rc-slider",
-  "version": "5.2.0",
+  "version": "5.3.0",
   "description": "slider ui component for react",
   "keywords": [
     "react",
@@ -19,10 +19,14 @@
   },
   "files": [
     "assets/*.css",
-    "lib"
+    "lib",
+    "dist"
   ],
   "licenses": "MIT",
   "main": "./lib/index.js",
+  "entry": {
+    "rc-slider": ["./src/index.js", "./assets/index.less"]
+  },
   "style": "./assets/index.css",
   "config": {
     "port": 8005

src/Slider.jsx

@@ -101,7 +101,7 @@ class Slider extends React.Component {
     const isNotControlled = !('value' in props);
     if (isNotControlled) {
       this.setState(state);
-    } else if (state.handle) {
+    } else if (state.handle !== undefined) {
       this.setState({ handle: state.handle });
     }