update version to 4.7.0 for release and update metadata (supported Py…

…thon version)

mfem/__init__.py

@@ -20,5 +20,5 @@ def debug_print(message):
 
     print(message)
 
-__version__ = '4.7.0rc6'
+__version__ = '4.7.0'
 

setup.py

@@ -212,14 +212,14 @@ def read_mfem_tplflags(prefix):
             'long_description_content_type': "text/markdown",
             'url': 'http://mfem.org',
             'download_url': 'https://github.com/mfem',
-            'classifiers': ['Development Status :: 4 - Beta',
+            'classifiers': ['Development Status :: 5 - Production/Stable',
                             'Intended Audience :: Developers',
                             'Topic :: Scientific/Engineering :: Physics',
                             'License :: OSI Approved :: BSD License',
-                            'Programming Language :: Python :: 3.7',
                             'Programming Language :: Python :: 3.8',
                             'Programming Language :: Python :: 3.9',
-                            'Programming Language :: Python :: 3.10', ],
+                            'Programming Language :: Python :: 3.10',
+                            'Programming Language :: Python :: 3.11', ],
             'keywords': [k for k in keywords.split('\n') if k],
             'platforms': [p for p in platforms.split('\n') if p],
             'license': 'BSD-3',