[272] Enforce the version of coverage manually (pip fails to resolve)

[nolar]

Resolve coveralls vs. pytest-cov battle for coverage versions due to coverage==5.0 release 2 days ago.

Issue : closes #272
Affected: #258

Description

coverage==5.0 has been release on 14.12.2019 (2 days ago). This broke the CI/CD, as pip cannot resolve the version conflict:

• pytest-cov wants coverage>=4.4, and is executed first.
• coverage==5.0 is found and installed.
• coveralls wants coverage<5.0, but it is too late to reinstall.

The fix is to install coverage<5.0 before any of the dependencies request it. The solution is temporary by its nature. See #273 for a more generic approach (version pinning and auto-upgrading) — will be done somewhen later.

Types of Changes

• Bug fix (non-breaking change which fixes an issue)

[zincr]

🤖 zincr found 0 problems , 1 warning

ℹ️ Dependency Licensing
✅ Large Commits
✅ Approvals
✅ Specification

Details on how to resolve are provided below

---

Dependency Licensing

All dependencies specified in package manager files must be reviewed, banned dependency licenses will block the merge, all new dependencies introduced in this pull request will give a warning, but not block the merge

Please ensure that only dependencies with licenses compatible with the license of this project is included in the pull request.

• ℹ️ Could not process requirements.txt for new dependencies
   

[zincr]

🤖 zincr found 1 problem , 1 warning

❌ Approvals
ℹ️ Dependency Licensing
✅ Large Commits
✅ Specification

Details on how to resolve are provided below

---

Approvals

All proposed changes must be reviewed by project maintainers before they can be merged

Not enough people have approved this pull request - please ensure that 1 additional user, who have not contributed to this pull request approve the changes.

• ✅ Approved by PR author @nolar
• ❌ 1 additional approval needed
   

Dependency Licensing

All dependencies specified in package manager files must be reviewed, banned dependency licenses will block the merge, all new dependencies introduced in this pull request will give a warning, but not block the merge

Please ensure that only dependencies with licenses compatible with the license of this project is included in the pull request.

• ℹ️ Could not process requirements.txt for new dependencies