Update module exports for new API

Export new symbols from config, serialization, and decorator modules.
Reorganize imports for clarity.

Author: Nils Bars

ref_utils/__init__.py

@@ -1,8 +1,57 @@
 """Import functions to avoid .dot import for user""" # pylint: disable = invalid-name
-__all__ = ['process', 'assertion', 'utils', "decorator"]
-from .process import drop_privileges, run, get_payload_from_executable, ref_util_install_global_exception_hook, run_with_payload, run_capture_output
+__all__ = [
+    # Modules
+    'process', 'assertion', 'utils', 'decorator', 'config', 'serialization',
+    # Config
+    'Config', 'get_config', 'set_config', 'override_config',
+    # Assertion
+    'assert_is_dir', 'assert_is_exec', 'assert_is_file',
+    # Decorator
+    'TestResult', 'TaskTestResult', 'environment_test', 'submission_test',
+    'add_environment_test', 'add_submission_test', 'run_tests',
+    # Process
+    'drop_privileges', 'run', 'run_capture_output', 'run_with_payload',
+    'get_payload_from_executable', 'ref_util_install_global_exception_hook',
+    # Serialization
+    'IPCSerializer', 'TypeCodec', 'safe_dumps', 'safe_loads', 'get_serializer',
+    # Utils
+    'print_ok', 'print_warn', 'print_err', 'write_stdout',
+    'decode_or_str', 'test_result_will_be_submitted', 'get_user_environment',
+]
 from .assertion import assert_is_dir, assert_is_exec, assert_is_file
-from .utils import print_ok, print_warn, print_err, write_stdout, decode_or_str, test_result_will_be_submitted, get_user_environment
-from .decorator import add_environment_test, add_submission_test, environment_test, submission_test, run_tests, TestResult
+from .config import Config, get_config, override_config, set_config
+from .decorator import (
+    TaskTestResult,
+    TestResult,
+    add_environment_test,
+    add_submission_test,
+    environment_test,
+    run_tests,
+    submission_test,
+)
+from .process import (
+    drop_privileges,
+    get_payload_from_executable,
+    ref_util_install_global_exception_hook,
+    run,
+    run_capture_output,
+    run_with_payload,
+)
+from .serialization import (
+    IPCSerializer,
+    TypeCodec,
+    get_serializer,
+    safe_dumps,
+    safe_loads,
+)
+from .utils import (
+    decode_or_str,
+    get_user_environment,
+    print_err,
+    print_ok,
+    print_warn,
+    test_result_will_be_submitted,
+    write_stdout,
+)
 
 ref_util_install_global_exception_hook()