Small Code fixes
Small Code fixes

- changed the new `public` attributes to `open dynamic`
- fixed a syntax error on `didSwipeSelf`
zekunyan/TTGSnackbar,klwoon/TTGSnackbar,zekunyan/TTGSnackbar,klwoon/TTGSnackbar,zekunyan/TTGSnackbar,kuyazee/TTGSnackbar,klwoon/TTGSnackbar,kuyazee/TTGSnackbar