Bump ol-layerswitcher from 3.8.0 to 3.8.1
Bump ol-layerswitcher from 3.8.0 to 3.8.1

Bumps [ol-layerswitcher](https://github.com/walkermatt/ol-layerswitcher) from 3.8.0 to 3.8.1.
- [Release notes](https://github.com/walkermatt/ol-layerswitcher/releases)
- [Changelog](https://github.com/walkermatt/ol-layerswitcher/blob/master/CHANGELOG.md)
- [Commits](https://github.com/walkermatt/ol-layerswitcher/compare/v3.8.0...v3.8.1)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
camptocamp/ngeo,camptocamp/ngeo,camptocamp/ngeo,camptocamp/ngeo,camptocamp/ngeo