Add calculations/helpers/*.xml to MANIFEST.in

[qiaojunfeng]

Otherwise the calculations.helpers.pw_input_helper will raise exception here

aiida-quantumespresso/aiida_quantumespresso/calculations/helpers/__init__.py

Lines 181 to 206 in d541e0e

	module_dir = os.path.dirname(__file__)
	if module_dir == '':
	module_dir = os.curdir
	xml_path = os.path.join(module_dir, f'INPUT_PW-{version}.xml')
	try:
	with open(xml_path, 'r') as handle:
	dom = xml.dom.minidom.parse(handle)
	except IOError as exception:
	prefix = 'INPUT_PW-'
	suffix = '.xml'
	versions = [
	fname[len(prefix):-len(suffix)]
	for fname in os.listdir(module_dir)
	if fname.startswith(prefix) and fname.endswith(suffix)
	]
	versions = sorted(versions, key=Version)
	strictversions = versions + [version]
	strictversions = sorted(strictversions, key=Version)
	pos = strictversions.index(version)
	if pos == 0:
	add_str = ' (the version you specified is too old)'
	else:
	add_str = f' (the older, closest version you can use is {strictversions[pos - 1]})'
	raise QEInputValidationError(
	f"Unknown Quantum Espresso version: {version}. Available versions: {', '.join(versions)};{add_str}"
	) from exception

[sphuber]

Thanks @qiaojunfeng

[ltalirz]

Hey guys, just realized that this was fixed already - can you please make a new release?

PyPI build is still broken #765