Add possibility to leave subject capitilized

[rylek90]

Since, there's a rule https://conventional-changelog.github.io/commitlint/#/reference-rules?id=subject-case to enforce subject's case.

For people using cz-customizable along with commitlint it'd be nice to have possibility to leave subject as is (do not make it lowercase).

AC:

• Add { lowerCaseSubject } with default true to configuration.
• When loweCaseSubject === false do not transform subject from This is subject to this is subject

I can push a PR for this soon if no one will pick this.

[leonardoanalista]

I like it! Default value sounds good, no breaking changes.
Feel free to decide between “upperCaseSubject” with default false or your suggestion

[leonardoanalista]

🎉 This issue has been resolved in version 5.10.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀