build(deps-dev): update @stencil/core requirement (#3861)
build(deps-dev): update @stencil/core requirement (#3861)

Updates the requirements on [@stencil/core](https://github.com/ionic-team/stencil) to permit the latest version.
- [Release notes](https://github.com/ionic-team/stencil/releases)
- [Changelog](https://github.com/ionic-team/stencil/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ionic-team/stencil/commits/v0.18.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
driftyco/ionic-cli,driftyco/ionic-cli,driftyco/ionic-cli