build(deps): bump @docusaurus/core from 2.0.0-alpha.71 to 2.0.0-alpha…

….72 (#251)

* build(deps): bump @docusaurus/core from 2.0.0-alpha.71 to 2.0.0-alpha.72

Bumps [@docusaurus/core](https://github.com/facebook/docusaurus/tree/HEAD/packages/docusaurus) from 2.0.0-alpha.71 to 2.0.0-alpha.72.
- [Release notes](https://github.com/facebook/docusaurus/releases)
- [Changelog](https://github.com/facebook/docusaurus/blob/master/CHANGELOG-2.x.md)
- [Commits](https://github.com/facebook/docusaurus/commits/v2.0.0-alpha.72/packages/docusaurus)

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

* upgrade other docusaurus dependencies

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Hugo van Rijswijk <dev@hugovr.nl>