⬆️ Bump @polymer/paper-menu-button from 3.0.1 to 3.1.0

Bumps [@polymer/paper-menu-button](https://github.com/PolymerElements/paper-menu-button) from 3.0.1 to 3.1.0.
- [Release notes](https://github.com/PolymerElements/paper-menu-button/releases)
- [Commits](PolymerElements/paper-menu-button@v3.0.1...v3.1.0)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -41,7 +41,7 @@
 		"@polymer/paper-icon-button": "^3.0.2",
 		"@polymer/paper-item": "^3.0.1",
 		"@polymer/paper-listbox": "^3.0.1",
-		"@polymer/paper-menu-button": "^3.0.1",
+		"@polymer/paper-menu-button": "^3.1.0",
 		"@polymer/paper-progress": "^3.0.1",
 		"@polymer/paper-spinner": "^3.0.2",
 		"@polymer/paper-tabs": "^3.1.0",