Context on wapm-cli features

[syrusakbary]

Current wapm-cli features:

[features]
default = ["full","packagesigning", "sqlite-bundled"]
sqlite-bundled = ["rusqlite/bundled"]
telemetry = ["sentry"]
update-notifications= ["billboard", "colored"]
prehash-module = ["hex", "blake3"]
packagesigning = []#[cfg(feature = "full")]
integration_tests = ["maplit", "wapm-toml/integration_tests"]
full = [ "dirs", "rusqlite", "prettytable-rs", "reqwest" ]

Analysis on code feature flags:
sqlite-bundled: it helped on using sqlite in macOS M1 (see #201)
telemetry: to add sentry monitoring
update-notifications: to check on the background when wasmer has a new version (this can be probably removed / always on or based on config)
prehash-module: it can probably be removed since it doesn't add that much value and can be always included (doesn't add that much code size)
packagesigning: it can probably be removed and be always on
integration_tests: it should be removed.

This leaves the only following feature flags:

• sqlite-bundled: since it's to solve a macOS M1 issue when using sqlite
• telemetry: we need to think if we want this to be always on or based on config instead

[Michael-F-Bryan]

After talking with @syrusakbary and @fschutt, we're thinking we won't immediately update feature flags now. Instead, we'll try to removing things while migrating wapm's functionality into the wasmer CLI.