update release CI scripts

Author: sshiraiwa

.github/workflows/testrelease_binary.yml

@@ -61,6 +61,7 @@ jobs:
           export PATH=/opt/python/${{ matrix.pythonpath }}/bin:$PATH
 
           python -c "import setuptools;print('setuptools version', setuptools.__version__)"
+          pip3 install setuptools==67.4.0
           pip3 install auditwheel twine
           pip3 install urllib3==1.26.6    # use older version to avoid OpenSSL vesion issue
 

mfem/__init__.py

@@ -20,5 +20,5 @@ def debug_print(message):
 
     print(message)
 
-__version__ = '4.7.0rc3'
+__version__ = '4.7.0rc4'