Remove react-native-maps (and replace with Mapbox)

[drewvolz]

@hawkrives did work to replace react-native-maps in favor of react-native-map-box-gl.

The bonus is -- #2306 compiles and runs once this PR is integrated. So we get to perform the RN upgrade.

If we keep using react-native-maps, otoh, react-native-maps/react-native-maps#2053 won't let us actually run the app.

[hawkrives]

This will eventually be used by my fancy campus map implementation that's currently incubating in CARLS

[drewvolz]

that's currently incubating

marinating 🍲

[stodevx-bot]

	Warnings
⚠️	The Xcode project file changed. Maintainers, double-check the changes!
⚠️	Could not get info from npm on @mapbox/react-native-mapbox-gl

New dependencies added: @mapbox/react-native-mapbox-gl.

Generated by 🚫 dangerJS

[rye]

🐞

[hawkrives]

@rye 👞

[stodevx-bot]

iOS Report

Analysis of slow build times (>20s)

1m 18s: AllAboutOlaf/AllAboutOlaf [Release]
  0m 56s: Running script 'Bundle React Native code and images'
0m 26s: React/double-conversion [Release]
  0m 25s: Running script 'Install Third Party'
0m 14s: React/third-party [Release]
0m 11s: Bugsnag/BugsnagStatic [Release]
1m 09s: React/React [Release]
0m 10s: RCTMGL/RCTMGL [Release]
0m 29s: React/cxxreact [Release]

Generated by 🚫 dangerJS