Codecov updates (#152)

* Only process and upload code coverage results in two cases.

* Wait to report codecov checks until they are both in.

.github/workflows/CI.yml

@@ -82,7 +82,10 @@ jobs:
           arch: ${{ matrix.julia-arch }}
       - uses: julia-actions/julia-runtest@v1
       - uses: julia-actions/julia-processcoverage@v1
+        if: ${{ matrix.julia-version == 'min' && matrix.julia-arch == 'x64' || matrix.julia-version == 1 && matrix.os == 'ubuntu-latest' }}
       - uses: codecov/codecov-action@v5
+        # Only upload two runs. We should cover everything in one of these two cases.
+        if: ${{ matrix.julia-version == 'min' && matrix.julia-arch == 'x64' || matrix.julia-version == 1 && matrix.os == 'ubuntu-latest' }}
         with:
           files: lcov.info
   regression-tests:

codecov.yml

@@ -0,0 +1,4 @@
+comment: false
+codecov:
+  notify:
+    after_n_builds: 2