[feature] Add a main script to print neuralprophet version

neuralprophet/__main__.py

@@ -0,0 +1,16 @@
+"""
+Invokes neuralprophet when module is run as a script.
+"""
+import argparse
+
+from neuralprophet._version import __version__
+
+
+def parse_args(args=None):
+    parser = argparse.ArgumentParser(description="NeuralProphet")
+    parser.add_argument("-v", "--version", action="version", version="%(prog)s " + __version__)
+    return parser.parse_args(args)
+
+
+if __name__ == "__main__":
+    parse_args()

tests/test_cli.py

@@ -0,0 +1,13 @@
+import pytest
+
+from neuralprophet.__main__ import parse_args
+from neuralprophet._version import __version__
+
+
+def test_main_file(capsys):
+    with pytest.raises(SystemExit) as exit_info:
+        parse_args(["--version"])
+
+    out, _ = capsys.readouterr()
+    assert exit_info.value.code == 0
+    assert __version__ in out