Version 1.1.0 and CHANGELOG update

[jreineckearm]

What it does

• Updates version to 1.0.0 for upcoming release.
• Updates CHANGELOG.md with changes since 1.0.1 release.

How to test

No code change.

Review checklist

• [x] as an author, I have thoroughly tested my changes and carefully followed the contribution guidelines

Reminder for reviewers

• as a reviewer, I agree to behave in accordance with the code of conduct

[jreineckearm]

Thanks, @thegecko ! @colin-grant-work , @planger , are you equally happy? Someone with committer rights would need to merge.