fix pytest and mypy issues

Author: MAKOMO

src/conftest.py

@@ -5,6 +5,7 @@
 import pytest
 import numpy as np # pylint: disable=unused-import
 import scipy.optimize # need to import globally to avoid reimport # pylint: disable=unused-import
+from typing import Any
 
 
 ####
@@ -14,14 +15,14 @@
 
 ALL = set('darwin linux win32'.split())
 
-def pytest_runtest_setup(item):
+def pytest_runtest_setup(item:Any) -> None:
     supported_platforms = ALL.intersection(mark.name for mark in item.iter_markers())
     plat = sys.platform
     if supported_platforms and plat not in supported_platforms:
         pytest.skip(f"cannot run on platform {plat}")
 
 # register platform markers
-def pytest_configure(config):
+def pytest_configure(config:Any) -> None:
     for plat in ALL:
         config.addinivalue_line(
             'markers', f"{plat}: mark test to run only on named platform")

src/test/sanity/test_load_save.py

@@ -48,6 +48,7 @@ class FileData(TypedDict):
 values_to_ignore = [
     'roasttime',    # without seconds in CSV
     'roasttzoffset',
+    'roastepoch',
     'timex',        # times are rounded to seconds
     'extradevices', # not stored in CSV, generated DUMMY (50)
     'extratimex',   # times are rounded to