Prepare releases for libwebauthn, solo-virtual-key

[AlfioEmanueleFresta]

Changes:

• Rename solo to solo-virtual-key, prepare manifest for crates.io release
• Update version for libwebauthn and push tag

Testing:

$ cargo publish --dry-run -p solo-virtual-key

Above succeeds.

$ cargo publish --dry-run -p libwebauthn

Fails as solo-virtual-key has not yet been updated/published.

Caused by:
  failed to select a version for the requirement `solo-virtual-key = "^0.2"`
  candidate versions found which didn't match: 0.1.0
  location searched: crates.io index
  required by package `libwebauthn v0.2.2 (/home/afresta/workspace/libwebauthn/libwebauthn)`

[msirringhaus]

We talked about switching to solo2 before. It's probably too big of a migration to do that before publishing this, I guess?

[AlfioEmanueleFresta]

Sadly not trivial enough for this. Also worth noting the first release already uses solo (published on crares.io under solo-virtual-key), but I had failed to commit my changes.

[msirringhaus]

Then we are good to go!