fix the failing CI on master

[gaborbernat]

The PR also bumps the linter tool versions, and drop python3.4 as the CI no longer supports it.

[asottile]

[todo]

process numbers work differently on pypy")

tox/tests/integration/test_parallel_interrupt.py

Lines 17 to 20 in 38fe5fc

	@pytest.mark.skipif(INFO.IS_PYPY, reason="TODO: process numbers work differently on pypy")
	@pytest.mark.skipif(
	"sys.platform == 'win32'", reason="triggering SIGINT reliably on Windows is hard"
	)

---

This comment was generated by todo based on a TODO comment in 38fe5fc in #1456. cc @gaborbernat.

[todo]

process numbers work differently on pypy")

tox/tests/integration/test_provision_int.py

Lines 67 to 70 in 38fe5fc

	@pytest.mark.skipif(INFO.IS_PYPY, reason="TODO: process numbers work differently on pypy")
	@pytest.mark.skipif(
	"sys.platform == 'win32'", reason="triggering SIGINT reliably on Windows is hard"
	)

---

This comment was generated by todo based on a TODO comment in 38fe5fc in #1456. cc @gaborbernat.

[todo]

process numbers work differently on pypy")

tox/tests/integration/test_parallel_interrupt.py

Lines 17 to 20 in 0bc8aad

	@pytest.mark.skipif(INFO.IS_PYPY, reason="TODO: process numbers work differently on pypy")
	@pytest.mark.skipif(
	"sys.platform == 'win32'", reason="triggering SIGINT reliably on Windows is hard"
	)

---

This comment was generated by todo based on a TODO comment in 0bc8aad in #1456. cc @gaborbernat.

[todo]

process numbers work differently on pypy")

tox/tests/integration/test_provision_int.py

Lines 67 to 70 in 0bc8aad

	@pytest.mark.skipif(INFO.IS_PYPY, reason="TODO: process numbers work differently on pypy")
	@pytest.mark.skipif(
	"sys.platform == 'win32'", reason="triggering SIGINT reliably on Windows is hard"
	)

---

This comment was generated by todo based on a TODO comment in 0bc8aad in #1456. cc @gaborbernat.

[gaborbernat]

That was long but succeeded 👍