:arrow_up: Bump attrs from 21.2.0 to 21.3.0#150

dependabot[bot] wants to merge 1 commit intomainLondonBiofoundry/SequencePoolGenerator:mainfrom

dependabot/pip/attrs-21.3.0LondonBiofoundry/SequencePoolGenerator:dependabot/pip/attrs-21.3.0Copy head branch name to clipboard