[doc] Add v1.1.0 changelog

CHANGELOG.md

+## [v1.1.0](https://git.duniter.org/clients/python/duniterpy/-/milestones/18) (14th February 2022)
+
+### Project
+- #179, !172: Drop Python v3.6 support
+- #188, !168: Introduce Python 3.10 support
+- #145, !171: Bump copyright to 2022
+
+### Code
+- #187, !167: Implement `__eq__` and `__hash__` `Documents` methods
+- #146, !166: Use `f-string`
+
+### Dev Env/CI
+- #90, #103, !113: Pytest introduction, coverage report and badge generations
+- #165, !170: Stop using the Makefile in the CI and tools installed from Poetry dev dependencies in favor of pre-commit
+- #186, !164: Introduce `pyupgrade` pre-commit hook
+- !163: pylint: Remove `R0401` and `R0904` disables
+- !169: Bump pre-commit hooks version, Handle new Pylint rules
+- #182, !170: Bump Sphinx to v4
+
+---
+
+- Thanks @Moul, @vtexier
+
 ## [v1.0.0](https://git.duniter.org/clients/python/duniterpy/-/milestones/12) (21st August 2021)
 **See below the main changes for the v1.0**