Build: Improve release script
Build: Improve release script

Improve `release` script and make it:

 * update `snyk-snapshot.json` file (Fix #467)
 * allow users to tweak `CHANGELOG.md` before commiting it (Fix #475)

alrra/sonar,sonarwhal/sonar,sonarwhal/sonar,alrra/sonar,alrra/sonar,sonarwhal/sonar