Bump contextlib2 from 0.5.5 to 0.6.0.post1
Bump contextlib2 from 0.5.5 to 0.6.0.post1

Bumps [contextlib2](https://github.com/jazzband/contextlib2) from 0.5.5 to 0.6.0.post1.
- [Release notes](https://github.com/jazzband/contextlib2/releases)
- [Commits](https://github.com/jazzband/contextlib2/compare/v0.5.5...v0.6.0.post1)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
glogiotatidis/snippets-service,glogiotatidis/snippets-service,mozmar/snippets-service,glogiotatidis/snippets-service,mozmar/snippets-service,glogiotatidis/snippets-service,mozmar/snippets-service,mozmar/snippets-service