Store Docs Artifacts (ethereum#133)

* Store artifacts in docs CI

* Force `pytest` import above all else

Author: reedsa

.circleci/config.yml

@@ -105,6 +105,8 @@ docs: &docs
     - run:
         name: run tox
         command: python -m tox run -r
+    - store_artifacts:
+          path: /home/circleci/repo/docs/_build
     - save_cache:
         paths:
           - .tox

pyproject.toml

@@ -7,6 +7,7 @@ combine_as_imports = true
 extra_standard_library = "pytest"
 force_grid_wrap = 1
 force_sort_within_sections = true
+force_to_top = "pytest"
 honor_noqa = true
 known_first_party = "<MODULE_NAME>"
 known_third_party = "hypothesis"