Bump pytz from 2018.4 to 2018.5 (#961)
Bump pytz from 2018.4 to 2018.5 (#961)

Bumps [pytz](https://github.com/stub42/pytz) from 2018.4 to 2018.5.
- [Release notes](https://github.com/stub42/pytz/releases)
- [Commits](https://github.com/stub42/pytz/compare/release_2018.4...release_2018.5)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
skylines-project/skylines,RBE-Avionik/skylines,Turbo87/skylines,Harry-R/skylines,Turbo87/skylines,skylines-project/skylines,RBE-Avionik/skylines,RBE-Avionik/skylines,skylines-project/skylines,Harry-R/skylines,Turbo87/skylines,Harry-R/skylines,Harry-R/skylines,RBE-Avionik/skylines,Turbo87/skylines,skylines-project/skylines