Bump scipy from 1.3.1 to 1.3.3 in /environments/centos7-plbase (#1886)
Bump scipy from 1.3.1 to 1.3.3 in /environments/centos7-plbase (#1886)

Bumps [scipy](https://github.com/scipy/scipy) from 1.3.1 to 1.3.3.
- [Release notes](https://github.com/scipy/scipy/releases)
- [Commits](https://github.com/scipy/scipy/compare/v1.3.1...v1.3.3)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
mwest1066/PrairieLearn,mwest1066/PrairieLearn,mwest1066/PrairieLearn,mwest1066/PrairieLearn,mwest1066/PrairieLearn