version info for import.meta.env

[alex-vg]

Please highlight in the docs, that import.meta.env is only available starting with version 16.0.0.
This is important since the ngx-env version is strongly coupled to the angular version of the project.

I did not find updates for previous major versions, that make import.meta.env available.

[chihab]

Thanks for raising the point.
I'll see if I can make import.meta available for v14 and v15 too