ISTWCMS-5509: adding minimum to have PL running

src/patterns/01-core/elements/_headings.scss

src/patterns/01-core/elements/_horizontal-rule.scss

src/patterns/01-core/elements/_html.scss

src/patterns/01-core/elements/_iframe.scss

src/patterns/01-core/elements/_img.scss

src/patterns/01-core/elements/_index.scss

src/patterns/01-core/elements/_inline-elements.scss

src/patterns/01-core/elements/_input.scss

src/patterns/01-core/elements/_label.scss

src/patterns/01-core/elements/_legend.scss

src/patterns/01-core/elements/_list-item.scss

src/patterns/01-core/elements/_main.scss

src/patterns/01-core/elements/_menu.scss

src/patterns/01-core/elements/_meter.scss

src/patterns/01-core/elements/_nav.scss

src/patterns/01-core/elements/_object.scss

src/patterns/01-core/elements/_option.scss

src/patterns/01-core/elements/_ordered-list.scss

src/patterns/01-core/elements/_output.scss

src/patterns/01-core/elements/_paragraph.scss