Feat add parser opts

[mmamedel]

This feature would allow adding custom options when calling Conventional Commits Parser. This would allow usage with providers that use different patterns and additional user customization. Fixes #634, #690

Another possible way to solve this is adding the parserOpts to the .versionrc file. But that would involve changes with the (conventional-changelog-config-spec)[https://github.com/conventional-changelog/conventional-changelog-config-spec]. It might be a cleaner solution at the end.

[naimahnash]

Would love for this to be merged, the last thing missing before I can use standard-version

[gauravmalik1011]

Is there any plan to accept writerOpts as arguments(https://github.com/conventional-changelog/standard-version/issues/362) in standard-version similar to parserOpts ?