Conflicts within dev requirements installation.

[pipermerriam]

What is wrong?

A pip install -e .[dev] from the current master (https://github.com/ethereum/py-evm/tree/6fca8f723244c2e7f920a6aa18689ae61e257d03) results in the following errors:

eth-abi 1.2.2 has requirement eth-typing<2, but you'll have eth-typing 2.0.0 which is incompatible.
pytest 3.6.4 has requirement pluggy<0.8,>=0.5, but you'll have pluggy 0.8.0 which is incompatible.

How can it be fixed

• The pytest/pluggy conflict comes from tox
• The eth-abi/typing conflict comes from web3.py

We should be able to fix the pytest/pluggy/tox issue by futzing until we find a compatable pair of pytest/tox versions. Note that both have had major version bumps so we should work to upgrade them.

We should be able to fix the eth-abi one by making a 1.x release of eth-abi that supports eth-typing>=2 as well as a web3.py release that allows for this if needed.

[javimaravillas]

Fix for: The pytest/pluggy conflict comes from tox
#1538

Pytest build is not running successfulll after that, I will post in a different issue (tested with all the possibles pluggy versions to avoid that the pluggy version I have added is introducing the issue and it is not looking to)

[javimaravillas]

I will continue with this issue to fix:

eth-abi 1.2.2 has requirement eth-typing<2, but you'll have eth-typing 2.0.0 which is incompatible.

[rayrapetyan]

@javimaravillas, could you also upgrade coincurve to v10 as part of this task? Outdated v8 produces some issues on certain OSes (FreeBSD).
Basically replace:

coincurve>=8.0.0,<9.0.0

with

coincurve>=10.0.0,<11.0.0

in two places. I don't think it worth a separate PR. Thanks.

[javimaravillas]

Done

I'm setting the PR to WIP until I'm able to fix

eth-abi 1.2.2 has requirement eth-typing<2, but you'll have eth-typing 2.0.0 which is incompatible.

[javimaravillas]

Waiting for ethereum/eth-abi#110 to be merged and a new version released from eth-abi 1.x for updating the PR and fixing this issue.

[javimaravillas]

The previous two error has been fixed, but another error has come:

requests 2.20.1 has requirement idna<2.8,>=2.5, but you'll have idna 2.8 which is incompatible.

Fixing idna to 2.7 is making this error to disappear.

[javimaravillas]

This issue is fixed now in: #1538

[javimaravillas]

This one could be closed now

[carver]

Thanks @javimaravillas !