Bump ansible from 2.8.8 to 4.2.0

Bumps [ansible](https://github.com/ansible/ansible) from 2.8.8 to 4.2.0.
- [Release notes](https://github.com/ansible/ansible/releases)
- [Commits](https://github.com/ansible/ansible/commits)

---
updated-dependencies:
- dependency-name: ansible
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,4 +1,4 @@
-ansible==2.8.8
+ansible==4.2.0
 molecule==2.22
 python-vagrant==0.5.15
 boto==2.49.0