Bump csc-ui from 0.6.15 to 0.6.18 in /swift_browser_ui_frontend

Bumps [csc-ui](https://github.com/CSCfi/csc-ui) from 0.6.15 to 0.6.18.
- [Release notes](https://github.com/CSCfi/csc-ui/releases)
- [Changelog](https://github.com/CSCfi/csc-ui/blob/v0.6.18/CHANGELOG.md)
- [Commits](https://github.com/CSCfi/csc-ui/compare/v0.6.15...v0.6.18)

---
updated-dependencies:
- dependency-name: csc-ui
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

swift_browser_ui_frontend/package-lock.json

@@ -42,7 +42,7 @@
     "@vue/vue2-jest": "^27.0.0",
     "babel-jest": "^27.5.1",
     "cli-highlight": "^2.1.11",
-    "csc-ui": "^0.6.15",
+    "csc-ui": "^0.6.18",
     "csc-ui-vue-directive": "^0.0.6",
     "cypress": "^12.5.1",
     "eslint-plugin-vue": "^9.9.0",