fix: upgrade nodemon from 2.0.15 to 2.0.19

Snyk has created this PR to upgrade nodemon from 2.0.15 to 2.0.19.

See this package in npm:
https://www.npmjs.com/package/nodemon

See this project in Snyk:
https://app.snyk.io/org/loft-fzm/project/26cb5baf-e951-41af-b409-50643b33626a?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot