fix: add null guard to toast._container

[thkruz]

Closes issue Dogfalo#1394

Proposed changes

Correct type for _container and add null guards.

Types of changes

• [ x] Bug fix (non-breaking change which fixes an issue).
• New feature (non-breaking change which adds functionality).
• Breaking change (fix or feature that would cause existing functionality to change).

Checklist:

• [ x] I have read the CONTRIBUTING document.
• [ x] My commit messages follows the conventional commit format
• My change requires a change to the documentation, and updated it accordingly.
• [ x] I have added tests to cover my changes.
• [ x] All new and existing tests passed.

[gselderslaghs]

Cool catch, works as expected
@wuda-io

[wuda-io]

you changed the dist files, the changes will get overwritten at the next build.
Edit: Oh, I saw that you changed the toast file as well. I will take a closer look later.

[wuda-io]

LGTM, but we have to change the .gitignore to ignore the dist files and use the files in package.json to upload the files to npm. Because in this commit there are dist files, but i will merge them for now, they will get overwritten in the next build and release process.

[gselderslaghs]

@wuda-io could it be this merge is still missing from the v2-dev branch?