Rewrite some really truly amazingly darn outdated CI (#115)

Author: gwynne

.github/workflows/main-codecov.yml

@@ -0,0 +1,9 @@
+name: Update code coverage baselines
+on:
+  push: { branches: [ main ] }
+jobs:
+  update-main-codecov:
+    uses: vapor/ci/.github/workflows/run-unit-tests.yml@reusable-workflows
+    with:
+      with_coverage: true
+      with_tsan: true

.github/workflows/test.yml

@@ -2,28 +2,40 @@ name: test
 on:
 - pull_request
 jobs:
-  websocket-kit_xenial:
-    container: 
-      image: vapor/swift:5.2-xenial
+  vapor-integration:
     runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v1
-    - run: swift test --enable-test-discovery --sanitize=thread
-  websocket-kit_bionic:
     container: 
-      image: vapor/swift:5.2-bionic
-    runs-on: ubuntu-latest
+      image: swift:5.6-focal
     steps:
-    - uses: actions/checkout@v1
-    - run: swift test --enable-test-discovery --sanitize=thread
-  vapor:
-    container: 
-      image: vapor/swift:5.2
+      - name: Check out package
+        uses: actions/checkout@v3
+        with: { path: 'websocket-kit' }
+      - name: Check out Vapor
+        uses: actions/checkout@v3
+        with: { repository: 'vapor/vapor', path: 'vapor' }
+      - name: Use local package in Vapor
+        run: |
+          swift package --package-path vapor edit websocket-kit --path websocket-kit
+      - name: Run Vapor tests
+        run: swift test --package-path vapor
+
+  unit-tests:
+    uses: vapor/ci/.github/workflows/run-unit-tests.yml@reusable-workflows
+    with:
+      with_coverage: true
+      with_tsan: false
+      coverage_ignores: '/Tests/'
+      
+  api-breakage:
     runs-on: ubuntu-latest
+    container:
+      image: swift:5.6-focal
     steps:
-    - run: git clone -b main https://github.com/vapor/vapor.git
-      working-directory: ./
-    - run: swift package edit websocket-kit --revision ${{ github.sha }}
-      working-directory: ./vapor
-    - run: swift test --enable-test-discovery --sanitize=thread
-      working-directory: ./vapor
+    - name: Checkout
+      uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+    - name: Mark the workspace as safe
+      run: git config --global --add safe.directory ${GITHUB_WORKSPACE}
+    - name: API breaking changes
+      run: swift package diagnose-api-breaking-changes origin/main