Download 2018 data, remove classes that have been copied to R5#16

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ansoncfit wants to merge 7 commits intomasterfrom lodes-data-2018

Commits on Jan 3, 2020

build: update dependencies and POM for java 11
abyrd
committed

Commits on Mar 12, 2021

Merge branch 'master' of https://github.com/conveyal/seamless-census
ansoncfit
committed