In ts, the align of NavbarContainerProps is limited to left or right.

[llnancy]

Describe the bug
In ts, the align of NavbarContainerProps is limited to left or right. So we can't use 'start' or 'end'. The example in the storybook is wrong.

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
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Versions

• react-bulma-components:: latest
• bulma: latest
• react: latest
• Browser: (e.g. Firefox version 67)

Additional context
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