config: envconfig now supports maps
config: envconfig now supports maps

This lets us now get rid of our code to handle this separately.

The code in question was added recently and included in 1.3.0:

https://github.com/kelseyhightower/envconfig/commit/f611eb38b3875cc3bd991ca91c51d06446afa14c

nebolsin/tyk,mvdan/tyk,mvdan/tyk,mvdan/tyk,nebolsin/tyk,mvdan/tyk,mvdan/tyk,nebolsin/tyk,mvdan/tyk,mvdan/tyk,nebolsin/tyk,lonelycode/tyk,nebolsin/tyk,nebolsin/tyk,lonelycode/tyk,nebolsin/tyk,nebolsin/tyk,mvdan/tyk,lonelycode/tyk