Add Python 3.10 (bigscience-workshop#830)

Author: dirkgr

setup.py

@@ -30,7 +30,7 @@
  url='https://github.com/bigscience-workshop/promptsource.git',
  author='BigScience - Prompt Engineering Working Group',
  author_email='sbach@cs.brown.edu,victor@huggingface.co',
- python_requires='>=3.7,<3.10',
+ python_requires='>=3.7,<3.11',
  install_requires=requirements,
  classifiers=[
  'Development Status :: 2 - Pre-Alpha',
@@ -41,6 +41,7 @@
  'Programming Language :: Python :: 3.7',
  'Programming Language :: Python :: 3.8',
  'Programming Language :: Python :: 3.9',
+ 'Programming Language :: Python :: 3.10',
  ],
  description='An Integrated Development Environment and Repository for Natural Language Prompts.',
  packages=find_packages(),