build(deps-dev): bump ng-packagr from 5.5.1 to 5.7.1#513

dependabot-preview[bot] wants to merge 1 commit intomastercormacrelf/angular-skyhook:masterfrom

dependabot/npm_and_yarn/ng-packagr-5.7.1cormacrelf/angular-skyhook:dependabot/npm_and_yarn/ng-packagr-5.7.1Copy head branch name to clipboard