The 2.x value always represents the latest version of SuiteScript that is generally available. It does not represent any versions that are released as beta features. Because SuiteScript 2.1 is being released as a beta in 2019.2, the 2.x value indicates that a script uses SuiteScript 2.0. When SuiteScript 2.1 is generally available in a future release, the 2.x value will indicate that a script uses SuiteScript 2.1