Only check ethpm for now with black

Author: kclowes

tox.ini

@@ -58,7 +58,7 @@ basepython=python
 extras=linter
 commands=
     flake8 {toxinidir}/web3 {toxinidir}/ens {toxinidir}/ethpm {toxinidir}/tests --exclude {toxinidir}/ethpm/ethpm-spec
-    black {toxinidir}/web3 {toxinidir}/ens {toxinidir}/ethpm {toxinidir}/tests --exclude {toxinidir}/ethpm/ethpm-spec --check
+    black {toxinidir}/ethpm --exclude {toxinidir}/ethpm/ethpm-spec {toxinidir}/web3 {toxinidir}/ens {toxinidir}/tests --check
     isort --recursive --check-only --diff {toxinidir}/web3/ {toxinidir}/ens/ {toxinidir}/ethpm/ {toxinidir}/tests/
     mypy -p web3 -p ethpm -p ens --config-file {toxinidir}/mypy.ini