Enhance CI workflow by adding coverage reporter to test step and integrating Coveralls action

Author: daniel-sc

.github/workflows/build.yml

@@ -13,7 +13,9 @@ jobs:
           bun-version: 1.2
       - name: Install dependencies
         run: bun install
-      - name: Test
-        run: bun test --coverage
       - name: Typecheck
         run: bun typecheck
+      - name: Test
+        run: bun test --coverage --coverage-reporter=lcov
+      - name: Coveralls GitHub Action
+        uses: coverallsapp/[email protected]