Bump environs from 9.3.0 to 9.3.1

Bumps environs from 9.3.0 to 9.3.1.

Changelog

Sourced from environs's changelog.

9.3.1 (2021-02-07)

Bug fixes:

• Apply variable expansion to default values (#204). Thanks rjcohn for the PR.

Commits

• ccd0f06 Bump version and update changelog
• dad57b7 Apply variable expansion to default values (#204)
• b95960b Bump mypy from 0.790 to 0.800 (#203)
• See full diff in compare view