👩‍💻 Put builds into a build matrix

Also upload artifacts, add Linux target.

.github/workflows/build.yaml

@@ -6,7 +6,10 @@ on:
   pull_request:
 jobs:
   build_windows:
-    runs-on: [windows-latest]
+    strategy:
+      matrix:
+        os: [windows-latest, ubuntu-latest]
+    runs-on: 
     env:
       DEPOT_TOOLS_WIN_TOOLCHAIN: 0
     steps:
@@ -20,3 +23,9 @@ jobs:
       - uses: threeal/[email protected]
       - name: Build Shared Library
         run: cmake --build build --config release
+      - name: 'Upload Artifact'
+        uses: actions/upload-artifact@v3
+        with:
+          name: libs
+          path: ./build/src/Release/
+

.vscode/settings.json

@@ -4,5 +4,8 @@
         "**/.DS_Store": true,    // this is a default value
 
         "dart-sdk/": true
-    }
+    },
+    "dart.analysisExcludedFolders": [
+        "dart-sdk"
+    ]
 }