Exclude/Preserve lines when stamp_changelog

[Blackjacx]

I setup the changelog plugin of the gem danger which enforces a certain changelog style which is very suitable. But it forces me to keep the line * Your contribution here. directly under the ## [Unreleased] section of my changelog. This is very good so contributer know where to add new changes. On the other hand I

1. Don't want to exclude this line from my changelog of a certain version when I call stamp_changelog
2. I want to preserve this line in my ## [Unreleased] section when I call stamp_changelog

I propose to add the option to Exclude a certain text when stamping a changelog version and preserve this exact text in the unreleased section.

[pajapro]

Hey @Blackjacx,

thanks for bringing up this feature request - I think this could be useful to many others.

I have implemented it, but would like you to review my PR before I merge & release this functionality #26.

Looking forward to your feedback

[Blackjacx]

Sorry for the comment before. It just works!!! Thank you very much :-)

[Blackjacx]

When can you release this fix?

[pajapro]

Hey @Blackjacx, this feature is release now in version 0.9.0 - enjoy 🎉

[Blackjacx]

Wooow thank you so much!!!