Update codecov to run on python 3.10 builds (#1727)

* move up codecov version to python 3.10
* walking forward to v4 of the codecov uploader

---------

Co-authored-by: ssteinbach <[email protected]>

Author: ssteinbach

.github/workflows/python-package.yml

@@ -5,7 +5,7 @@ name: OpenTimelineIO
 
 # for configuring which build will be a C++ coverage build / coverage report
 env:
-  GH_COV_PY: 3.7
+  GH_COV_PY: "3.10"
   GH_COV_OS: ubuntu-22.04
   GH_DEPENDABOT: dependabot
 
@@ -151,8 +151,9 @@ jobs:
       run: make lcov
     - name: Upload coverage to Codecov
       if: matrix.python-version == env.GH_COV_PY && matrix.os == env.GH_COV_OS && github.actor != env.GH_DEPENDABOT
-      uses: codecov/codecov-action@v3.1.4
+      uses: codecov/codecov-action@v4
       with:
+        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
         flags: py-unittests
         name: py-opentimelineio-codecov
         fail_ci_if_error: true