ci upgrades

Author: dpep

.github/dependabot.yml

@@ -14,3 +14,4 @@ updates:
       interval: "weekly"
     pull-request-branch-name:
       separator: "-"
+    versioning-strategy: lockfile-only

.github/workflows/ruby.yml

@@ -1,10 +1,9 @@
-name: Ruby checks
+name: Ruby
 
 on:
   push:
-    branches: [ "main" ]
+    branches: [ main ]
   pull_request:
-    types: [ opened, edited, synchronize ]
 
 jobs:
   test:
@@ -13,13 +12,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby-version: [ 3.1, 3.0, 2.7 ]
+        ruby-version: [ 3, 3.1, "3.0" ]
 
     name: Ruby ${{ matrix.ruby-version }}
 
     steps:
       - name: clone ${{ github.repository }}
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: setup Ruby ${{ matrix.ruby-version }}
         uses: ruby/setup-ruby@v1
         with:
@@ -28,4 +27,6 @@ jobs:
       - name: run tests
         run: bundle exec rspec
       - name: upload code coverage
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}