Use codecov instead of coverall

Author: Cito

.travis.yml

@@ -22,11 +22,11 @@ cache:
   - $HOME/.cache/pip
   - $TRAVIS_BUILD_DIR/.tox
 install:
-- pip install tox coveralls
+- pip install tox codecov
 script:
-- tox -e $TOX_ENV -- --cov=graphql_server
+- tox -e $TOX_ENV -- --cov-report term-missing --cov=graphql_server
 after_success:
-- coveralls
+- codecov
 deploy:
   provider: pypi
   user: syrusakbary

README.md

@@ -1,6 +1,8 @@
 # GraphQL-Server-Core
 
-[![Build Status](https://travis-ci.org/graphql-python/graphql-server-core.svg?branch=master)](https://travis-ci.org/graphql-python/graphql-server-core) [![Coverage Status](https://coveralls.io/repos/graphql-python/graphql-server-core/badge.svg?branch=master&service=github)](https://coveralls.io/github/graphql-python/graphql-server-core?branch=master) [![PyPI version](https://badge.fury.io/py/graphql-server-core.svg)](https://badge.fury.io/py/graphql-server-core)
+[![PyPI version](https://badge.fury.io/py/graphql-server-core.svg)](https://badge.fury.io/py/graphql-server-core)
+[![Build Status](https://travis-ci.org/graphql-python/graphql-server-core.svg?branch=master)](https://travis-ci.org/graphql-python/graphql-server-core)
+[![Coverage Status](https://codecov.io/gh/graphql-python/graphql-server-core/branch/master/graph/badge.svg)](https://codecov.io/gh/graphql-python/graphql-server-core)
 
 GraphQL-Server-Core is a base library that serves as a helper
 for building GraphQL servers or integrations into existing web frameworks using

codecov.yml

@@ -0,0 +1,10 @@
+codecov:
+  notify:
+    require_ci_to_pass: yes
+
+comment: no
+coverage:
+  status:
+    project:
+      default:
+        target: auto

tox.ini

@@ -6,9 +6,9 @@ skipsdist = true
 setenv =
     PYTHONPATH = {toxinidir}
 deps =
-    pytest>=3.0
-    graphql-core>=2.1
-    pytest-cov
+    pytest>=3.0,<4
+    graphql-core>=2.1,<3
+    pytest-cov>=2.7
 commands =
     py{py,27,33,34,35,36,37}: py.test tests {posargs}