* added mypy dependency

* added dev-mypy

* added mypy make target

* declare EMPTY class prop

* removed incorrect tensors type hint

* added type hint to excluded_tokens

* removed unused ProcessedWrapper

* replacing backports.tempfile with builtin

* added T_ArgumentParserOrGroup

* fixed iter_tokenized_tokens return type hint

* added types-requests

* added type to DEFAULT_ANNOTATORS

* removed blank line

* ignore distutils import

* replaced T_Element with etree.ElementBase

* changed type check back to etree._Element

* replaced project_tests.sh

* removed second mypy make target dependency