dev: minor cleanups (#64)

feat: support prefixes for nested structs (#53)

chore: downgrade Go to 1.20 (#51)

chore: migrate to a vanity import path (#26)

test: use assert installer (#25)

chore: migrate to go-simpler (#24)

feat: loading from multiple providers (#18)

docs: apply 1.19 godoc formatting (#16)

feat: strict mode (#13)

feat: `default` struct tag (#11)