pin pytest-asyncio to 0.10.0 (#804)
pin pytest-asyncio to 0.10.0 (#804)

The recently released 0.11.0 requires pytest 5+, which doesn't support
Python 2.7
beniwohli/apm-agent-python,beniwohli/apm-agent-python,beniwohli/apm-agent-python,beniwohli/apm-agent-python