starling 4.0.0

This tree structure is a binary merkle tree with branch compression via split indexes.
Documentation
version: 2
updates:
- package-ecosystem: cargo
  directory: "/"
  schedule:
    interval: daily
  open-pull-requests-limit: 10
  reviewers:
  - ChosunOne
  assignees:
  - ChosunOne
  ignore:
  - dependency-name: hashbrown
    versions:
    - 0.10.0
    - 0.11.0
    - 0.11.1
  - dependency-name: rand
    versions:
    - 0.8.3