making add_help optional for parse and parse_known_args functions (#360)

Author: farzad-elastix

simple_parsing/parsing.py

@@ -1008,6 +1008,7 @@ def parse(
     dest: str = "config",
     *,
     prefix: str = "",
+    add_help: bool = True,
     nested_mode: NestedMode = NestedMode.WITHOUT_ROOT,
     conflict_resolution: ConflictResolution = ConflictResolution.AUTO,
     add_option_string_dash_variants: DashVariant = DashVariant.AUTO,
@@ -1028,7 +1029,7 @@ def parse(
 
     parser = ArgumentParser(
         nested_mode=nested_mode,
-        add_help=True,
+        add_help=add_help,
         config_path=config_path,
         conflict_resolution=conflict_resolution,
         add_option_string_dash_variants=add_option_string_dash_variants,
@@ -1056,6 +1057,7 @@ def parse_known_args(
     dest: str = "config",
     attempt_to_reorder: bool = False,
     *,
+    add_help: bool = True,
     nested_mode: NestedMode = NestedMode.WITHOUT_ROOT,
     conflict_resolution: ConflictResolution = ConflictResolution.AUTO,
     add_option_string_dash_variants: DashVariant = DashVariant.AUTO,
@@ -1075,7 +1077,7 @@ def parse_known_args(
         args = shlex.split(args)
     parser = ArgumentParser(
         nested_mode=nested_mode,
-        add_help=True,
+        add_help=add_help,
         # add_config_path_arg=None,
         config_path=config_path,
         conflict_resolution=conflict_resolution,