replace setup.cfg with pyproject.toml

tox.ini

@@ -32,7 +32,7 @@ commands =
     bandit romancal -r -x tests,regtest
 
 [testenv:check-install]
-description = verify that install_requires in setup.cfg is correct
+description = verify that dependencies are correct
 extras =
 commands =
     verify_install_requires
@@ -47,7 +47,7 @@ description =
     regtests: with --bigdata and --slow flags
     cov: with coverage
     xdist: using parallel processing
-# The following indicates which extras_require from setup.cfg will be installed
+# The following indicates which `optional-dependencies` from `pyproject.toml` will be installed
 extras =
     test
     alldeps: all