Fix `in` & `not` filters

[drkameleon]

Right now, none of the queries below work as expected.

Find all people whose birthday (year) is either 1960 or 1980:

person [
    birthday: -> in: [1960, 1980]
]

Find all people whose birthday (year) is between 1960 and 1965: (how neat does this look!)

person [
    birthday: -> in: 1960..1965
]

Find all people whose birthday (year) is neither 1970 nor 1974:

person [
    birthday: -> not: [1970, 1974]
]

[drkameleon]

Ready to merge! 🚀