Issue #876: update to Checkstyle 11.0.0

[vtintillier]

Fixes #876

[AmitKumarDeoghoria]

@romani can we have this merged

[romani]

@Calixte drives a project.
I am fine to merge, but there should be single commit with only 11.0.0 .

[AmitKumarDeoghoria]

@Calixte drives a project. I am fine to merge, but there should be single commit with only 11.0.0 .

I will cherry pick the changes and raiser a Mr

[romani]

@AmitKumarDeoghoria , let's not interfere with activity of @vtintillier .
They will update it when required or they have time.

[AmitKumarDeoghoria]

@AmitKumarDeoghoria , let's not interfere with activity of @vtintillier . They will update it when required or they have time.

sventu Upgradation to 11.0.0 blocked because of this

[romani]

They catching up, version by version.
Please give them some to catch up on 3 version

[romani]

@vtintillier , please rebase , all other PRs are merged

[vtintillier]

Hi @romani @Calixte , this last PR is rebased.
Thank you for all the releases 🚀