Bump proj4 from 2.7.0 to 2.7.2
Bump proj4 from 2.7.0 to 2.7.2

Bumps [proj4](https://github.com/proj4js/proj4js) from 2.7.0 to 2.7.2.
- [Release notes](https://github.com/proj4js/proj4js/releases)
- [Changelog](https://github.com/proj4js/proj4js/blob/master/changelog.md)
- [Commits](https://github.com/proj4js/proj4js/compare/2.7.0...2.7.2)

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