PySCF 1.7.6 release

1.7.6a1

Merge pull request #723 from sunqm/master

Upgrade integral engine to libcint 4

PySCF 1.7.4 release

PySCF 1.7.3 release

PySCF 1.7.2 release

PySCF 1.7.1 release

v1.7.0 release

pyscf 1.6.6

pyscf 1.6.5