V2.1.0: Tricontour fix projections

This release hotfixes two bugs.

1. It fixes a bug where the dpi would be changed by external packages that create figures using matplotlib axes
2. It fixes a bug where the projection was assumed to be PlateCaree for tri-related functions

What's Changed

• Update build-states to new test-map.yml by @cvanelteren in #590
• Fix/preserve dpi draw without rendering by @cvanelteren in #591
• Fix cartopy tri default transform for Triangulation inputs by @cvanelteren in #595

Full Changelog: v2.0.1...V2.1.0