CI: Drop Python 3.7 from testing

Author: mr-c

.github/workflows/ci-tests.yml

@@ -32,7 +32,7 @@ jobs:
     strategy:
       matrix:
         py-ver-major: [3]
-        py-ver-minor: [6, 7, 8, 9, 10, 11]
+        py-ver-minor: [6, 8, 9, 10, 11]
         step: [lint, unit, bandit, mypy]
         exclude:
           - py-ver-major: 3

README.rst

@@ -52,7 +52,7 @@ and provide comprehensive validation of CWL
 files as well as provide other tools related to working with CWL.
 
 ``cwltool`` is written and tested for
-`Python <https://www.python.org/>`_ ``3.x {x = 6, 7, 8, 9, 10, 11}``
+`Python <https://www.python.org/>`_ ``3.x {x = 6, 8, 9, 10, 11}``
 
 The reference implementation consists of two packages.  The ``cwltool`` package
 is the primary Python module containing the reference implementation in the

setup.py

@@ -162,7 +162,6 @@
         "Operating System :: POSIX :: Linux",
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",