Successfully validate int as float type

An integer can be used where a float is required since it is
implicitly upcast if needed. This is particularly relevant for data
that originates from parsing a string (e.g. JSON), where a number
with no decimal places will be represented as an integer.
Successfully validate int as float type
Bump version to 0.7.2
Merge branch 'kynan-validate-int-as-float'