Conventional commits parser fails when using "!" to signify breaking change

[wschurman]

https://github.com/conventional-changelog/conventional-changelog/issues/648

Angular parser is the correct one I think https://github.com/conventional-changelog/conventional-changelog/tree/0d7385543cbf14394206c2f739a82d1ccf118586/packages/conventional-changelog-angular

As described in https://www.conventionalcommits.org/en/v1.0.0/.

This is making the changelog incorrect for our project since I've been following that spec.