Issue processing values that end in "+"?

[veltman]

As an example, table B25077 provides "Median value of owner-occupied housing units", but for any place where the value is over $1,000,000, the census just lists "$1,000,000+". In Census Reporter, that shows up as "$1,000,001," when it seems like the plus sign should be preserved to indicate it's not an exact value.

I'd try to submit a PR for this but I'm not sure how to fix it. Seems like the exact point that the switch occurs is in value_rpn_calc() in census_extractomatic/api.py.