Version 1.4.0

• Update project to use java version 21.x
• Enable dependabot to validate repo for vulnerabilities.
• Enable CodeQL to run code scans.
• Fix reported issues of new tools integrated in this version.

Version 1.3.0

Add new practices for certification, math, regex, sort and structures.

Version 1.2.0

Solution to hackerrank problems using java with tests and CI.