Upgrading to latest mypy.

Makefile

@@ -29,7 +29,7 @@ pylint:
 
 mypy:
 	@echo Performing type analysis via mypy...
-	@mypy --disallow-untyped-defs --check-untyped-defs --ignore-missing-imports ${PY_SRC} || exit 1
+	@mypy ${PY_SRC} || exit 1
 
 coverage:
 	@echo Performing coverage checks...

dmt/commonPy/commonSMP2.py

@@ -3,7 +3,7 @@ import sys
 
 from typing import List, Union, Optional, Any, Tuple, Dict, NoReturn  # NOQA pylint: disable=unused-import
 
-from lxml import etree
+from lxml import etree  # type: ignore
 
 from .asnAST import (
     AsnBool, AsnInt, AsnReal, AsnEnumerated, AsnOctetString, AsnSequenceOf,

requirements.txt

 coverage>=3.7.1
 flake8==3.7.9
-mypy==0.530
+mypy==0.790
 pyflakes>=1.2.3
 pylint>=1.7.0
 pytest>=2.6.3
@@ -8,4 +8,4 @@ lxml>=3.6.0
 astroid>=1.4.6
 pycodestyle>=2.0.0
 typing-extensions
-mypy-extensions>=0.3.0
+mypy-extensions>=0.4.3