upgrade rc-slider

package.json

@@ -51,7 +51,7 @@
     "rc-progress": "~1.0.0",
     "rc-radio": "~2.0.0",
     "rc-select": "~4.9.0",
-    "rc-slider": "~1.4.0",
+    "rc-slider": "~1.5.0",
     "rc-steps": "~1.3.2",
     "rc-switch": "~1.2.0",
     "rc-table": "~3.2.0",

style/components/slider.less

@@ -11,7 +11,7 @@
 
 .@{slider-prefix-cls} {
   position: relative;
-  margin: 10px 0px 10px 7px;
+  margin: 10px 0;
   height: 12px;
   border-radius: 5px;
   background-color: #e9e9e9;