chore: use Day.js as peerDependencies (ant-design#214)

package.json

@@ -41,7 +41,6 @@
     "@babel/runtime": "^7.10.1",
     "classnames": "^2.2.1",
     "date-fns": "^2.15.0",
-    "dayjs": "^1.8.30",
     "moment": "^2.24.0",
     "rc-trigger": "^5.0.4",
     "rc-util": "^5.4.0",
@@ -60,6 +59,7 @@
     "@umijs/fabric": "^2.0.8",
     "coveralls": "^3.0.6",
     "cross-env": "^7.0.2",
+    "dayjs": "^1.8.30",
     "enzyme": "^3.0.0",
     "enzyme-adapter-react-16": "^1.0.1",
     "enzyme-to-json": "^3.4.0",
@@ -85,6 +85,7 @@
     "mode": "npm"
   },
   "peerDependencies": {
+    "dayjs": "^1.8.30",
     "react": ">=16.9.0",
     "react-dom": ">=16.9.0"
   }