Another feature resolution bug

[robertbastian]

The command

cargo run --all-features -- --keys=core/helloworld@1 --all-locales --format=blob --out=/dev/null --overwrite

fails when run at the workspace root, due to some problem in the time crate. When run from inside the icu_datagen crate, it succeeds. Updating Cargo.lock does not fix the issue, but using a more recent simple_logger does.

This is a problem with the workspace, so does not affect the release.

[sffc]

Note that the latest release of time requires a version of Rust newer than our MSRV, so I had to manually set it in the lockfile (cargo update --precise) to the latest version that is compatible with MSRV.