refactor coroutine lowering and tasks

transform/goroutine_test.go

@@ -0,0 +1,16 @@
+package transform
+
+import (
+	"testing"
+	"tinygo.org/x/go-llvm"
+)
+
+func TestGoroutineLowering(t *testing.T) {
+	t.Parallel()
+	testTransform(t, "testdata/coroutines", func(mod llvm.Module) {
+		err := LowerCoroutines(mod, false)
+		if err != nil {
+			panic(err)
+		}
+	})
+}