chore(release): set the release version to 0.5.0

chore(release): 0.4.0

[RELEASE] 0.3.2

[RELEASE] 0.3.1

[RELEASE] 0.3.0

[RELEASE] 0.2.2

[DOC] Change the project email (#135)

[RELEASE] Set version to 0.2.0 (#107)

Also update the CONTRIBUTING guide about the creation of the Pull Request that updates the version.

[RELEASE] Set version to 0.1.2 (#74)

[RELEASE] Set version to 0.1.1