remove skipif and update readme

Author: bstriner

Diff for: README.md

@@ -201,6 +201,8 @@ entry_point.run(uri=env.module_dir,
 
 If the entry point execution fails, `trainer.train()` will write the error message to `/opt/ml/output/failure`. Otherwise, it will write to the file `/opt/ml/success`.
 
+If `sagemaker_training` receives a `SIGTERM`, such as from `StopTrainingJob`, it will pass that signal to your script.
+
 ## :scroll: License
 
 This library is licensed under the [Apache 2.0 License](http://aws.amazon.com/apache2.0/).

Diff for: test/unit/test_process.py

@@ -192,7 +192,6 @@ def _sleep_subprocess(capture_error):
     exit(42)
 
 
-@pytest.mark.skipif(sys.version_info != (3, 7), reason="requires python3.7")
 @pytest.mark.parametrize("capture_error", [True, False])
 def test_check_error_signal(capture_error):
     proc = multiprocessing.Process(target=_sleep_subprocess, args=(capture_error,))