Only exit with !=0 for poe lint if errors (E) were found [fix]

pyproject.toml

@@ -50,7 +50,7 @@ clean = {ref = "_clean", help = "Clean up temporary files"}
 build = {cmd = "poetry build"}
 format = {shell = "isort krawl && yapf -i -r -vv -p krawl", help = "Format the code using YAPF"}
 check_format = {shell = "isort --check-only krawl && yapf -i -r -vv -p krawl", help = "Check whether the formatting is correct. Exits with 0 if it is"}
-lint = {cmd = "pylint ./krawl", help = "Use PyLint to evaluate the code quality"}
+lint = {cmd = "pylint --fail-under 5 --fail-on E krawl", help = "Use PyLint to evaluate the code quality"}
 _publish = {cmd = "poetry publish"}
 release = {sequence = ["format", "test", "build", "_publish"], help = "Create a release of the application and publish it on PyPi"}
 test = {cmd = "python -m unittest tests/**/*.py", help = "Run the test suits"}