Improve NAICS year specification for mappings

[bl-young]

          > @Jnamovich where did the census NAICS -> BEA mapping come from? it's missing some NAICS that only exist in 2012 but no longer exist in 2017

Good catch. Looks like those data were using 2012 NAICS until 2019 when they switched to 2017 NAICS. If that switch is not described in the data its something we should report to the API maintainers and maintain a config file mapping the source by data year to the right NAICS year and make sure our crosswalk has both like we have here in flowsa under NAICS timeseries

Originally posted by @WesIngwersen in #25 (comment)