Fix dependency conflicts

[jisantuc]

Overview

This PR replaces our default dependency resolver with coursier, upgrades some libraries for
consistency (like getting to circe 0.9.1 and geotrellis 2.0.0-RC2), explicitly adds some deps that weren't
picked up transitively (scalaz), uses some doobie combinators where we previously had strings, and adds an explicit COURSIER_CACHE environment variable to docker-compose. More on that last bit in notes.

Checklist

• PR has a name that won't get you publicly shamed for vagueness
• Any new SQL strings have tests

Notes

The COURSIER_CACHE environment variable is useful for sandboxing -- it's now possible, if you want to try out changing some dependencies without having to worry about your cache state affecting results. You can specify a different COURSIER_CACHE and know that the result of your dependency
changes has nothing to do with prior state. Neat! I used it as a way to test library upgrades to see how
much work it would be to get them to work, then changed the cache back and didn't have to
do anything to get to my prior working state. I threw this variable into docker-compose.yml because I
think we're more likely to edit it and wanted it somewhere more obvious than .env, but I'm open to
criticism/ergonomics feedback on that front.

Testing Instructions

• Delete everything in your .ivy cache (rm -rf app-backend/project/.ivy/cache/)
• console into your api server
• api/update
• watch as dependency hell fails to take hold of your soul

Closes #3757

[alkamin]

Neat! 🎉