consider release still with proj4 only

[mdsumner]

So that we can get anglr out without whole-hog PROJ.

Candidate 0.4.1

• [x] import and use crsmeta rather than $proj (add tests)
• [x] check on rhub
• [x] check win-devel
• [x] fix test coverage badge
• [ ] finish anglr
• [ ] update NEWs
• [ ] update cran-comments
• [ ] review docs
• [ ] check spell
• [ ] check winbuilder again

[mdsumner]

The crux is the two-column thing that changed, and whether anglr::globe() will work

[mdsumner]

Nuh, we good.