Bump coveralls from 1.10.0 to 1.11.1 in /packages/service-library

Bumps [coveralls](https://github.com/coveralls-clients/coveralls-python) from 1.10.0 to 1.11.1.
- [Release notes](https://github.com/coveralls-clients/coveralls-python/releases)
- [Changelog](https://github.com/coveralls-clients/coveralls-python/blob/master/CHANGELOG.md)
- [Commits](TheKevJames/coveralls-python@1.10.0...1.11.1)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

packages/service-library/requirements/_test.txt

@@ -13,7 +13,7 @@ attrs==19.3.0             # via -r requirements/_base.txt (line 11), aiohttp, js
 certifi==2019.11.28       # via requests
 chardet==3.0.4            # via -r requirements/_base.txt (line 12), aiohttp, requests
 coverage==4.5.1           # via -r requirements/_test.in (line 9), coveralls, pytest-cov
-coveralls==1.10.0         # via -r requirements/_test.in (line 22)
+coveralls==1.11.1         # via -r requirements/_test.in (line 22)
 docopt==0.6.2             # via coveralls
 idna==2.8                 # via -r requirements/_base.txt (line 13), requests, yarl
 isodate==0.6.0            # via -r requirements/_base.txt (line 14), openapi-core