fix(bindInput): convert numbers for input[type=number]

[vdegenne]

I also rearranged the code responsible for checking the type so it will work better with custom elements, for instance <md-outlined-text-field type="number">... will naturally work now and not just for <input type="number">

All tests passed 100%

[43081j]

date/time are an odd one

i wonder if we should be exposing it as a Date (via valueAsDate), or if not, keep it as a string. a number seems unexpected since value will be a date/time string on the native input

so i think it should be a string or a date but not a number