Bump node.extend from 1.1.6 to 1.1.8
Bump node.extend from 1.1.6 to 1.1.8

Bumps [node.extend](https://github.com/dreamerslab/node.extend) from 1.1.6 to 1.1.8.
- [Release notes](https://github.com/dreamerslab/node.extend/releases)
- [Changelog](https://github.com/dreamerslab/node.extend/blob/master/History.md)
- [Commits](https://github.com/dreamerslab/node.extend/compare/v1.1.6...v1.1.8)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
dainst/idai-components-2,dainst/idai-components-2,dainst/idai-components-2