ci: test esbuild-project example

Author: joelgallant

.github/workflows/main.yml

@@ -34,8 +34,9 @@ jobs:
       env: { CI: 1 }
       if: matrix.os != 'ubuntu-latest'
 
-    # sanity check that the rollup plugin made a file without needing to loadConfig
+    # sanity check that plugins made a file without needing to loadConfig
     - run: yarn --cwd ./examples/rollup-project start
+    - run: yarn --cwd ./examples/esbuild-project start
 
     - uses: codecov/codecov-action@v1
       if: matrix.os == 'ubuntu-latest'