feat: remove special char in namespace

[azaleta]

Description

closes #511

Linked Issues

Additional context

[lxchapu]

I think a new issue is created in src/core/utils.ts line 142.

- should be allowed in the regexp, so the following test cases should be passed

const inComponentFilePath = '/src/components/a-b/c.vue'
expect(getNameFromFilePath(inComponentFilePath, options as ResolvedOptions)).toBe('a-b-c')

thanks!
@azaleta