Disable monkeypatches, add dependencies via new hook (#60)

* code cleanups, disable monkeypatches, move to add_additional_deps

* disable incremental mode for tests

* add pip-wheel-metadata

* move some code from get_base_hook to get_attribute_hook to reduce dependencies

* simplify values/values_list tests and code

* disable cache for some tests failing with incremental mode

* enable incremental mode for tests typechecking

* pin mypy version

* fix tests

* lint

* fix internal crashes

pytest.ini

@@ -4,4 +4,4 @@ addopts =
     --tb=native
     --mypy-ini-file=./test-data/plugins.ini
     -s
-    -v
+    -v