Modify peer dependency to avoid a 7.x breaking change

[graue]

Previously, the 7.0 documentation suggested mapping "empty-npm-package@^1.0.0" to mapbox-gl when using react-map-gl with maplibre. In order to avoid a breaking change, this reverts the mapbox-gl peer dependency from ">=1.13.0" to ">=1.0.0" so that users who followed this advice can safely upgrade within the 7.x series, complying with semantic versioning. Fixes #2230.