Bump pg-promise from 10.8.6 to 10.8.7
Bump pg-promise from 10.8.6 to 10.8.7

Bumps [pg-promise](https://github.com/vitaly-t/pg-promise) from 10.8.6 to 10.8.7.
- [Release notes](https://github.com/vitaly-t/pg-promise/releases)
- [Commits](https://github.com/vitaly-t/pg-promise/compare/10.8.6...10.8.7)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
smashwilson/hubot-markov