v4.0.3

What's Changed

• Bump postcss from 8.4.6 to 8.4.7 by @dependabot in #189
• Bump actions/setup-node from 2 to 3 by @dependabot in #191
• Fix singular when unused variables is one by @XhmikosR in #190

Full Changelog: v4.0.2...v4.0.3