Update swift.yml

Author: artemisia-absynthium

.github/workflows/swift.yml

@@ -16,4 +16,9 @@ jobs:
     - name: Build
       run: swift build -v
     - name: Run tests
-      run: swift test -v
+      run: swift test -v --enable-code-coverage
+    - name: Export coverage report as Lcov
+      run: xcrun llvm-cov export -format="lcov" -instr-profile=.build/x86_64-apple-macosx/debug/codecov/default.profdata .build/x86_64-apple-macosx/debug/ShitLibPackageTests.xctest/Contents/MacOS/ShitLibPackageTests > lcov.info
+    - uses: codecov/codecov-action@v2
+      with:
+        files: lcov.info