tech: Reduce GitHub Actions workflow complexity

Project is undergoing a major refactoring period
where different approaches and fixes from various
repository forks are coming together.

Workflow is temporarily reduced in complexity and
coverage to get builds validating what is actually
supported.

Author: surpher

.github/workflows/build.yml

@@ -1,9 +1,10 @@
 name: Build
 
 on:
+  pull_request:
   push:
     branches:
-      - 'main'
+      - 'issue/**'
       - 'chore/**'
       - 'docs/**'
       - 'feat/**'
@@ -22,23 +23,23 @@ jobs:
   test:
     name: Run ${{ matrix.platform }} on ${{ matrix.host }}
     runs-on: ${{ matrix.host }}
-  
+
     strategy:
       fail-fast: true
       matrix:
-        host: [macos-11, macos-12]
+        host: [macos-13, macos-14]
         platform: [ios, macos]
         include:
           - platform: ios
             scheme: "PactSwift-iOS"
-            destination: "platform=iOS Simulator,name=iPhone 12 Pro"
+            destination: "platform=iOS Simulator,name=iPhone 15 Pro"
           - platform: macos
             scheme: "PactSwift-macOS"
             destination: "arch=x86_64"
-          - host: macos-11
-            xcode: 13.2.1
-          - host: macos-12
-            xcode: 14.0.1
+          - host: macos-13
+            xcode: 14.3.1
+          - host: macos-14
+            xcode: 15.3
 
     env:
       SCHEME: ${{ matrix.scheme }}
@@ -67,72 +68,3 @@ jobs:
         run: |
           swift build
           swift test -c release
-
-  test_linux:
-    name: Run on Ubuntu
-    runs-on: ubuntu-latest
-
-    strategy:
-      fail-fast: true
-
-    concurrency:
-      group: test-linux-${{ github.ref }}
-      cancel-in-progress: true
-
-    steps:
-      - uses: fwal/setup-swift@v1
-      - name: Get swift version
-        run: swift --version
-
-      - name: "⬇️  Checkout repository"
-        uses: actions/checkout@v2
-
-      - name: Install Protoc
-        uses: arduino/setup-protoc@v1
-
-      - name: "♼ Cache rust binaries"
-        uses: actions/cache@v3
-        with:
-          path: |
-            ${{ env.RUST_TARGET_PATH }}
-          key: build-${{ runner.os }}-rust-pactswift-${{ hashFiles('**/Package.resolved') }}
-          restore-keys: |
-            build-${{ runner.os }}-rust-pactswift
-            build-${{ runner.os }}-rust-
-
-      - name: "⚗️  Build and Test"
-        run: |
-          Scripts/build_test_linux
-
-  test_carthage:
-    name: "Verify for Carthage"
-    runs-on: macos-12
-
-    strategy:
-      fail-fast: true
-
-    concurrency:
-      group: test-carthage-${{ github.ref }}
-      cancel-in-progress: true
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v2
-
-      - name: Use Xcode 13.4.1
-        run: sudo xcode-select -switch /Applications/Xcode_13.4.1.app
-
-      - name: Carthage build
-        run: |
-          carthage build --use-xcframeworks --no-skip-current
-
-  after_success:
-    needs: [test, test_carthage, test_linux]
-    name: Build demo projects
-    if: github.ref == 'refs/heads/main'
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Build demo projects
-        run: |
-          curl -X POST https://api.github.com/repos/surpher/pact-swift-examples/dispatches -H 'Accept: application/vnd.github.everest-preview+json' -u ${{ secrets.PACT_SWIFT_TOKEN }} --data '{"event_type":"PactSwift - ${{ github.event.head_commit.message }}"}'