Fix CI coverage and dependabot.

Author: evetion

.github/dependabot.yml

@@ -0,0 +1,9 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+
+version: 2
+updates:
+- package-ecosystem: "" # See documentation for possible values
+  directory: "/" # Location of package manifests
+  schedule:
+    interval: "weekly"

.github/workflows/CI.yml

@@ -37,9 +37,11 @@ jobs:
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
       - uses: julia-actions/julia-processcoverage@v1
-      - uses: codecov/codecov-action@v2
+      - uses: codecov/codecov-action@v5
         with:
           files: lcov.info
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
   docs:
     name: Documentation
     runs-on: ubuntu-latest