tests: drop upper bound to pytest-sugar version With some other dev-requirements having no version specification, there is no real reason to keep an upper bound to pytest-sugar either. The lower bound is still relevant as that fixed a bug.

pytest>=2.7.0,<4.0
pytest-runner
pytest-sugar>=0.7.0
pytest-catchlog
WebTest<2 # this is also a Pylons dependency and pinned in setup.py to avoid version conflicts for WebOb
mock
sphinx