Bump minimist from 1.2.0 to 1.2.5 in /labextension/vpython

Bumps [minimist](https://github.com/substack/minimist) from 1.2.0 to 1.2.5.
- [Release notes](https://github.com/substack/minimist/releases)
- [Commits](https://github.com/substack/minimist/compare/1.2.0...1.2.5)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]