Scrolly changes

[sdl60660]

Corresponds with changes to vs-components here: https://github.com/ft-interactive/vs-components/pull/71 (as well as changes earlier this week), so the vs-components PR should be cleaned up/merged before this is reviewed/merged

• Bumping g-components version
• Bumping vs-components version (though this will need to change when that's actually released)
• Adding helper function (constructScrollySteps) for constructing scrolly steps by zipping together ArchieML doc data anyway waypoints or highlights data and turning the inner content into ingestible cards (we have some version of this helper in every project on a per-wrapper basis right now)
• Adding template ScrollySection wrapper component in sections
• Adding BodyText/Headline components that we frequently re-use, but need customization for almost every project

[danclark18]

lgtm @sdl60660! thanks for sorting this