Remove stac version and extensions from item collection#171

philvarner merged 2 commits intoradiantearth:devradiantearth/stac-api-spec:devfrom

philvarner:remove-stac-version-and-extensions-from-item-collectionphilvarner/stac-api-spec:remove-stac-version-and-extensions-from-item-collectionCopy head branch name to clipboard