Fix coveralls (#910)

* Do not pin coverage in Travis

* Remove coverage pin from buildout

* Pin coverage to latest version 5.1

* Pin coverage to 5.1

.travis.yml

@@ -60,7 +60,7 @@ script:
   - if [ "$PLONE_VERSION" == "5.2.x" ] && [ $TRAVIS_PYTHON_VERSION == '3.7' ]; then bin/test-no-sphinx-warnings ; fi
 after_success:
   - bin/test-coverage
-  - pip install coverage==3.7.1 coveralls
+  - pip install coverage==5.1 coveralls
   - coveralls
   # - docker login -u="$DOCKER_USERNAME" -p="$DOCKER_PASSWORD"
   # - if [ ! $TRAVIS_TAG ]; then docker build --tag plone/plone.restapi:plone-$PLONE_VERSION-$(git rev-parse HEAD) --tag plone/plone.restapi:latest . ; fi

plone-5.1.x.cfg

@@ -5,6 +5,8 @@ extends =
     versions.cfg
 
 [versions]
+coverage = 5.1
+
 # fixes: SyntaxError: invalid syntax (more.py, line 340)
 zipp = 0.5.2
 

plone-5.2.x.cfg

@@ -7,3 +7,4 @@ find-links += http://dist.plone.org/thirdparty/
 [versions]
 plone.restapi =
 astunparse = 1.6.2
+coverage = 5.1

versions.cfg

@@ -9,7 +9,7 @@ plone.recipe.varnish = 1.3
 
 # Code-analysis
 plone.recipe.codeanalysis = 3.0.1
-coverage = 3.7.1
+coverage = 5.1
 pep8 = 1.7.1
 flake8 = 3.5.0
 flake8-coding = 1.3.2