[FEATURE] identity functions
[CHORE] vault client: add type to attest parameters
[TASK] vault client: add parameters to attest
[TASK] switch to new attestation endpoint
[FEATURE] vault client: update attestation and attestation summary
[TASK] vault client: tests for attestation routes and full summary
Merge pull request #181 from shekenahglory/feature/identity

Feature/identity
[DOC] update release notes
[TASK] bump version to 0.8.3-rc1
[FIX] initialize unsubscribed order books
[FIX] vault client: URI decode attestation token