moving codecov bash executor to their github (#43)

relying on the contents of the github repo directly

Author: chayim

.circleci/config.yml

@@ -38,7 +38,7 @@ jobs:
       # run tests!
       - run: mvn integration-test
       - run: mvn cobertura:cobertura
-      - run: bash <(curl -s https://codecov.io/bash) -t ${CODECOV_TOKEN}
+      - run: bash <(curl -s https://raw.githubusercontent.com/codecov/codecov-action/master/codecov) -t ${CODECOV_TOKEN}
 
       - run: mvn -s .circleci.settings.xml -DskipTests deploy