v0.6.4

ADI v0.6.4

Diff since v0.6.3

Merged pull requests:

• Bump pillow from 8.0.1 to 8.1.1 in /bench (#52) (@dependabot[bot])
• Bump jinja2 from 2.11.2 to 2.11.3 in /bench (#53) (@dependabot[bot])
• Bump pyyaml from 5.3.1 to 5.4 in /bench (#54) (@dependabot[bot])