udate version to 2024.2.1

version number

updating version

changing version and updating warning message

Merge branch 'develop' of github.com:sccn/eeglab into develop

Merge branch 'develop' of github.com:sccn/eeglab into develop

Merge branch 'develop' of github.com:sccn/eeglab into develop

Merge branch 'develop' of github.com:sccn/eeglab into develop

fix eeglab.prj and change eeg_getversions

Merge branch 'develop' of github.com:sccn/eeglab into develop