feat(server): handle panic in runtime

ref #2

pkg/module/cast/module_test.go

@@ -1,6 +1,7 @@
 package cast
 
 import (
+	"context"
 	"io/ioutil"
 	"os"
 	"testing"
@@ -79,7 +80,7 @@ func TestCastModuleRefreshDevices(t *testing.T) {
 
 	defer server.Stop()
 
-	result, err := server.ExecFuncByName("refreshDevices")
+	result, err := server.ExecFuncByName(context.Background(), "refreshDevices")
 	if err != nil {
 		t.Error(errors.WithStack(err))
 	}