chore: switch travis python version to 3.11

Author: b1r3k

.travis.yml

@@ -1,10 +1,11 @@
 language: python
+dist: jammy
 python:
-  - "3.6.6"
+  - "3.11"
 # command to install dependencies
 install:
-  - pip install -r requirements-dev.txt
+  - make dev
 # command to run tests
 script:
-  - flake8 sdiff tests
-  - nosetests
+  - make test
+  - make coverage

setup.cfg

@@ -4,3 +4,9 @@ ignore = F403, F405
 
 [pep8]
 max-line-length = 120
+
+[coverage:run]
+branch = True
+
+[coverage:report]
+fail_under = 97