Revert "Drop support for EOL Python 3.7" · gitpython-developers/gitdb@bd21ed4

Original file line number	Diff line number	Diff line change
`@@ -22,7 +22,7 @@`
`22`	`22`	`zip_safe=False,`
`23`	`23`	`install_requires=['smmap>=3.0.1,<6'],`
`24`	`24`	`long_description="""GitDB is a pure-Python git object database""",`
`25`		`-python_requires='>=3.8',`
	`25`	`+python_requires='>=3.7',`
`26`	`26`	`# See https://pypi.python.org/pypi?%3Aaction=list_classifiers`
`27`	`27`	`classifiers=[`
`28`	`28`	`"Development Status :: 5 - Production/Stable",`
`@@ -35,6 +35,7 @@`
`35`	`35`	`"Operating System :: MacOS :: MacOS X",`
`36`	`36`	`"Programming Language :: Python",`
`37`	`37`	`"Programming Language :: Python :: 3",`
	`38`	`+"Programming Language :: Python :: 3.7",`
`38`	`39`	`"Programming Language :: Python :: 3.8",`
`39`	`40`	`"Programming Language :: Python :: 3.9",`
`40`	`41`	`"Programming Language :: Python :: 3.10",`