Enable named exports from 'ably/push' plugin for ESM and CJS consumers #2132
Description
Not a priority at the moment as we don't have a need to actually have named exports for Push plugin, but worth future-proofing and improving the build process in general.
See the implementation for Objects plugin: #2131.
The import for Push plugin will change:
// From:
import Push from 'ably/push';
// To:
import { Push } from 'ably/push';