fix: upgrade typeorm from 0.2.24 to 0.3.20

Snyk has created this PR to upgrade typeorm from 0.2.24 to 0.3.20.

See this package in npm:
typeorm

See this project in Snyk:
https://app.snyk.io/org/lirantal/project/f8ab60dc-dac0-4909-bf00-7bdd059d1416?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot