State-specific rules for when Medicaid

[This CMS document](https://www.cms.gov/marketplace/technical-assistance-resources/special-populations-pregnant-women.pdf) states:
>For Medicaid eligibility, if a pregnant woman is seeking an eligibility determination for herself, she is counted as one person plus the number of children expected to deliver. However, if a pregnant woman is in the household of someone who is seeking a Medicaid eligibility determination, states can opt to count her as one person, two people, or one person plus the number of children expected.

#5249 counts pregnant women as two people for all Medicaid calculations. This gets us closer to the right logic for pregnant applicants, but we (a) need to add the number of children expected to deliver (#5250) and then need to research the state rules around how other people in the household apply.