Delegate to 'gradle/actions/wrapper-validation' (#200)

Now that 'gradle/actions/wrapper-validation' has been released as v3.3.0, 
we remove this implementation and delegate via a composite action.

Fixes #198

.github/dependabot.yml

@@ -8,14 +8,3 @@ updates:
       github-actions:
         patterns:
         - "*"
-
-  - package-ecosystem: "npm"
-    directory: "/"
-    schedule:
-      interval: "weekly"
-    ignore:
-      - dependency-name: "@types/node"
-    groups:
-      npm-dependencies:
-        patterns:
-        - "*"

.github/workflows/ci.yml

@@ -7,22 +7,6 @@ on: # rebuild any PRs and main branch changes
       - 'releases/*'
 
 jobs:
-  build: # make sure build/ci work properly
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-    - name: Set up Node.js
-      uses: actions/setup-node@v4
-      with:
-        node-version: 20
-        cache: npm
-    - name: Build and test
-      run: |
-        npm -v
-        node -v
-        npm clean-install
-        npm run all
-
 
   # Integration test for successful validation of wrappers
   test-validation-success:
@@ -31,19 +15,6 @@ jobs:
     steps:
     - uses: actions/checkout@v4
 
-    - name: Set up Node.js
-      uses: actions/setup-node@v4
-      with:
-        node-version: 20
-
-    - name: Build action (pull request)
-      # Pull requests are not expected to update `dist/index.js` themselves; therefore build `dist/index.js`
-      # here before running integration test
-      if: github.event_name == 'pull_request'
-      run: |
-        npm clean-install
-        npm run build
-
     - name: Run wrapper-validation-action
       id: action-test
       uses: ./
@@ -71,19 +42,6 @@ jobs:
     steps:
     - uses: actions/checkout@v4
 
-    - name: Set up Node.js
-      uses: actions/setup-node@v4
-      with:
-        node-version: 20
-
-    - name: Build action (pull request)
-      # Pull requests are not expected to update `dist/index.js` themselves; therefore build `dist/index.js`
-      # here before running integration test
-      if: github.event_name == 'pull_request'
-      run: |
-        npm clean-install
-        npm run build
-
     - name: Run wrapper-validation-action
       id: action-test
       uses: ./