Bump postcss from 8.3.11 to 8.4.31 in /test-packages/old-app#317

dependabot[bot] wants to merge 1 commit intomastersalsify/ember-css-modules:masterfrom

dependabot/npm_and_yarn/test-packages/old-app/postcss-8.4.31salsify/ember-css-modules:dependabot/npm_and_yarn/test-packages/old-app/postcss-8.4.31Copy head branch name to clipboard