Update coveralls to 1.5.1

[pyup-bot]

This PR updates coveralls from 1.2.0 to 1.5.1.

Changelog

1.5.1

Features
* **git:**  omit git info when git isn't installed (187) ([764956ea](764956ea))
* ... instead of erroring. The fixes the v1.4.0 release of "supporting
 non-git repos" when the git binary is not installed.
* Note that commit info can still be set with env vars, even in non-git
 repositories -- see the docs for more info!

Compatibility
* **python:**  include python 3.7 in matrix tests ([023d474](023d474))
* previous versions of `coveralls-python` should be compatible with Python 3.7, no
 code changes were required to make tests pass

Internal
* remove `pytest-runner` as a dependency (185) ([4cbbfcd](4cbbfcd))

<a name="1.5.0"></a>

1.5.0

Features
* **cli:**  allow execution as a module (184) ([b261a853](b261a853), closes [183](183))

Bug Fixes
* **paths:**  ensure windows paths are normalized to posix ([661e0f54](661e0f54), closes [153](153))

<a name="1.4.0"></a>

1.4.0

Performance
* **git:**  call fallback git commands in fallback cases only ([e42095b4](e42095b4))

Features
* **env:**  support git env vars (182) ([a1918e89](a1918e89))
* This change also adds support for non-git repos.
* **flags:**  add ability to add named job (181) ([f7ba07bf](f7ba07bf))

Compatibility
* **python:**  drop support for Python 3.3 ([dcb06fc1](dcb06fc1))

<a name="1.3.0"></a>

1.3.0

Features
* **ci:**  add Travis PR support (162) ([baf683ee](baf683ee))
* **cli:**  allow `service_name` override from cli flag or env var (167) ([e8a98904](e8a98904))
* **coveralls-enterprise:**  add support for coveralls enterprise (166) ([7383f377](7383f377))
* **git:**  silently omit git data when git is unavailable (176) ([f9db83cd](f9db83cd))
* **jenkins:**
*  add logic to parse `CI_PULL_REQUEST` env variable (171) ([34a037f5](34a037f5))
*  add support for jenkins (160) ([4e8cd9ec](4e8cd9ec))

<a name="1.2.0"></a>

Links

• PyPI: https://pypi.org/project/coveralls
• Changelog: https://pyup.io/changelogs/coveralls/
• Repo: http://github.com/coveralls-clients/coveralls-python

[coveralls]

Coverage remained the same at 100.0% when pulling bf56d7b on pyup-update-coveralls-1.2.0-to-1.5.1 into b07575b on master.

[pyup-bot]

Closing this in favor of #206