Upgrade google-gmail1 from 6.0.0 to 7.0.0 which uses yup-oauth2 v12
that no longer depends on the unmaintained rustls-pemfile crate.
This resolves RUSTSEC-2025-0134 (rustls-pemfile unmaintained).
Breaking changes addressed:
- Updated InstalledFlowAuthenticator to use CustomHyperClientBuilder
- Added hyper-rustls with http1 feature for OAuth redirect flow
Signed-off-by: Jeremiah Russell <jerry@jrussell.ie>