• [browser] (BREAKING) Refactor startAttestation() and startAssertion() to return more of the output from the navigator.credentials calls
• [browser] Replace base64-js dependency with internal functionality
• [browser, server] Standardize on use of Base64URL encoding when converting to and from JSON
• [server] (BREAKING) Remove references to "base64" from generateAttestationOptions() and generateAssertionOptions() by renaming the excludedBase64CredentialIDs and allowedBase64CredentialIDs to excludedCredentialIDs and allowedCredentialIDs respectively
• [typescript-types] (BREAKING) Migrate some non-shared typings into server