Doing a release

First, make sure you are on develop and you have the latest changes
```
git checkout develop
git pull
```
Then, update the changelog by replacing the 'Unreleased' section with the released version. Remove all unused sections. Don't forget to copy and paste the changelog template at the end of the file to the top of the file.
Update version in package.json of ngx-piano project (projects/ngx-piano/package.json)
Commit the changes
```
git commit -m "chore: release vX.X.X"
```
Create a tag
```
git tag -a vX.X.X -m "vX.X.X"
```
Push the changes
```
git push --follow-tags
```
Go to interface
Create a merge request from develop to master
Merge the merge request if the pipeline has succeeded
The package will be released on npm by the CI

🎉 Congrats! You make a release!

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