Changes: - Throw error if no matching vs30 for hazard map compare - Update to nshmp-lib-ng 20.4.2, adds color bar number formatting Merge requests: - https://code.usgs.gov/ghsc/nshmp/nshmp-apps/-/merge_requests/658 - https://code.usgs.gov/ghsc/nshmp/nshmp-lib-ng/-/tags/20.4.2