Merge branch 'performance' into 'master'

.gitlab-ci.yml

angular.json

clean-dist.sh

package-lock.json

package.json

projects/nshmp-template/src/assets/icon-dot-gov.svg

projects/nshmp-template/src/assets/icon-https.svg

projects/nshmp-template/src/assets/us_flag_small.png

.../footer-bottom-navbar/footer-bottom-navbar.component.html

...ts/footer-bottom-navbar/footer-bottom-navbar.component.ts

...ents/gov-banner-content/gov-banner-content.component.html

...onents/gov-banner-header/gov-banner-header.component.html

...ate/src/lib/components/gov-banner/gov-banner.component.ts

...nshmp-template/src/lib/models/footer-social-link.model.ts

projects/nshmp-template/src/lib/modules/material.module.ts

...cts/nshmp-template/src/lib/modules/nshmp-layout.module.ts

projects/nshmp-template/src/scss/_material-theme.scss

projects/nshmp-template/src/scss/_uswds-theme.scss