v2.3

Fix some issues mostly at zoom level 0 to 7 which means I can just rerender these zoom levels and merge them into the planet. Thanks for the reported bugs and help.

Fixed bugs:

• import-osm produces SQL error when executing imposm3 #397
• Vector tile source "mapbox" layer "admin" does not use vector tile spec v2 #388
• country extract broken #385
• Problems with Natural Earth and OSM at South Pole #329
• Use only OSM data for oceans #401 (lukasmartinelli)

Closed issues:

• Water bodies with tag landuse=reservoir #390
• Dependency issue for merge-jobs #332

Merged pull requests:

• Compare with our public CDN version not Mapbox #400 (lukasmartinelli)
• Improved low zoom levels (show country_label earlier) #399 (lukasmartinelli)
• Let imposm3 handle cascade delete tables #398 (lukasmartinelli)