build(deps): update @types/storybook__addon-knobs requirement (#91)

Updates the requirements on [@types/storybook__addon-knobs](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/storybook__addon-knobs) to permit the latest version.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/storybook__addon-knobs)

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

superset-frontend/temporary_superset_ui/superset-ui/plugins/superset-ui-plugins/packages/superset-ui-plugins-demo/package.json

@@ -37,7 +37,7 @@
     "@storybook/addons": "^5.0.9",
     "@storybook/react": "^5.0.9",
     "@types/react": "^16.8.8",
-    "@types/storybook__addon-knobs": "^4.0.5",
+    "@types/storybook__addon-knobs": "^5.0.0",
     "bootstrap": "^4.3.1",
     "react": "^16.6.0",
     "storybook-addon-jsx": "^7.1.0"