[Security] Bump constantinople from 3.0.2 to 3.1.2

Bumps [constantinople](https://github.com/ForbesLindesay/constantinople) from 3.0.2 to 3.1.2. **This update includes security fixes.**
- [Release notes](https://github.com/ForbesLindesay/constantinople/releases)
- [Commits](pugjs/constantinople@3.0.2...3.1.2)

Signed-off-by: dependabot[bot] <[email protected]>