Remove Python 3.7 wheel generation from CI as EOL 2023-06-27

Does not remove workarounds in code for python <= 3.7, so it will still techniaclly be usable just not supported

.github/workflows/Draft-Release.yml

@@ -26,9 +26,9 @@ defaults:
 # + Thorough Windows builds
 #   + Oldest and newest cuda, lots of arch, vis off, tests on
 # + Wheel producing manylinux builds
-#   + CUDA 11.2 and 12.0, py 3.7-3.12, vis on/off, py only.
+#   + CUDA 11.2 and 12.0, py 3.8-3.12, vis on/off, py only.
 # + Wheel producing Windows builds
-#   + CUDA 11.2 and 12.0, py 3.7-3.12, vis on/off, py only.
+#   + CUDA 11.2 and 12.0, py 3.8-3.12, vis on/off, py only.
 # + Draft github release workflow.
 
 jobs:
@@ -324,7 +324,6 @@ jobs:
           - "3.10"
           - "3.9"
           - "3.8"
-          - "3.7"
         config:
           - name: "Release"
             config: "Release"
@@ -485,7 +484,6 @@ jobs:
           - "3.10"
           - "3.9"
           - "3.8"
-          - "3.7"
         config:
           - name: "Release"
             config: "Release"

README.md

@@ -74,7 +74,7 @@ Optionally:
 
 + [cpplint](https://github.com/cpplint/cpplint) for linting code
 + [Doxygen](http://www.doxygen.nl/) to build the documentation
-+ [Python](https://www.python.org/) `>= 3.7` for python integration
++ [Python](https://www.python.org/) `>= 3.8` for python integration
   + With `setuptools`, `wheel`, `build` and optionally `venv` python packages installed
 + [swig](http://www.swig.org/) `>= 4.0.2` for python integration
   + Swig `4.x` will be automatically downloaded by CMake if not provided (if possible).