v4.1.0: Restore keyring v1-like standalone functionality

This release moves the CLI binary out to an example so we can lose a lot of dependencies that aren't needed to use credential stores.

In addition, it recreates the v1 (and v2/v3) functionality of providing an Entry object that any app can use (without special features or initialization) to manage text and binary secrets. This is provided by the v1 feature, which is the default. (This change fixes #317.)

The ability to use any credential store is still preserved in the cli module but the cli feature which exposes it is not in the default feature set.

Strictly speaking, these changes are probably SemVer-significant. But since there are few to no clients of the existing library functionality, we're calling this a patch release.

What's Changed

• Bump rpassword from 7.5.2 to 7.5.3 by @dependabot[bot] in #319
• Prepare to release v4.1.0. by @brotskydotcom in #325

Full Changelog: v4.0.1...v4.1.0