Change: Coveralls runner python form v3.8 to v3.9 package.

Author: meherett

.travis.yml

@@ -17,4 +17,4 @@ matrix:
   - name: "3.9"
     python: 3.9
 script: pytest
-after_success: if [ "${TRAVIS_PYTHON_VERSION}" == "3.8" ]; then coveralls; fi;
+after_success: if [ "${TRAVIS_PYTHON_VERSION}" == "3.9" ]; then coveralls; fi;