Use the Natural Earth v4 database in tegola.toml

[PetersonGIS]

Currently the tegola-osm demo styles (HOTOSM, mobility, camo, night vision, osgeo) draw from a v3 natural earth database. We also have an extensive v4 database used in the Natural Earth Quickstart demo style. This issue is to move from the v3 database to the v4 database for all styles.

• Test the toml with a local version of the v4 natural earth database. Ensure all layers used in the v3 styles exist in the v4 database and that the existing sql will still work (no changed field names).
• Modify tegola.toml database connection details to match those in tegola-natural-earth.toml
• Re-run tiles, re-seed