chore(deps-dev): bump rc-dropdown from 3.0.2 to 3.1.0 (#465)

Bumps [rc-dropdown](https://github.com/react-component/dropdown) from 3.0.2 to 3.1.0.
- [Release notes](https://github.com/react-component/dropdown/releases)
- [Changelog](https://github.com/react-component/dropdown/blob/master/HISTORY.md)
- [Commits](react-component/dropdown@v3.0.2...v3.1.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

package.json

@@ -76,7 +76,7 @@
     "np": "^6.0.0",
     "prettier": "^2.0.1",
     "rc-animate": "^2.10.1",
-    "rc-dropdown": "~3.0.1",
+    "rc-dropdown": "~3.1.0",
     "rc-menu": "^8.0.2",
     "react": "^16.0.0",
     "react-dnd": "^2.5.4",