MAINT: Adopt allcontributors - close #82

[Lucas-C]

Preview:

allcontributors has support for several commitConvention: https://allcontributors.org/docs/fr/bot/configuration

Sadly none of them is compatible with our own custom commit message convention 😓

We could either:

• use commitConvention=eslint in .all-contributorsrc, which means we have to allow commits with a Docs: prefix in .github/scripts/check_pr_title.py
• submit a feature request to https://github.com/all-contributors/cli, to allow for custom prefixes like MAINT: or DOC:

For devs who would like to follow this lead, the necesseray changes do not seem huge:

• https://github.com/all-contributors/cli/blob/master/src/util/git.js
• https://github.com/all-contributors/cli/blob/master/src/init/commit-conventions.js

What do you think about this @MartinThoma? 🙂

[MartinThoma]

It certainly looks nice 😄

we have to allow commits with a Docs: prefix in .github/scripts/check_pr_title.py

Fine to me 👍

We would also need to adjust the code for auto-creating the release notes.

[Lucas-C]

We would also need to adjust the code for auto-creating the release notes.

Alright, I made the necessary changes.

Merging this PR now.