Make tox -e pylint run all commands, even when failing

Author: nathanaelbosch

tox.ini

@@ -53,6 +53,7 @@ commands =
 basepython = python3
 description = Code linting with pylint
 deps = pylint == 2.6
+ignore_errors = true
 commands =
          # pylint src
          pylint src/probnum/diffeq --disable="protected-access,abstract-class-instantiated,too-many-locals,too-few-public-methods,too-many-arguments,unused-argument,missing-module-docstring,missing-function-docstring"