Color contrast incomplete for label and input

[straker]

This returns incomplete for the label element because we try to get the midpoint of the label, which is way outside the text content.

<label>Do you like peas?
  <input name="peas" style="width: 100%">
</label>

[padmavemulapati]

Validated with the latest code base of axe-core develop branch,
with the code snippet:

<label>Do you like peas?
  <input name="peas" style="width: 100%">
</label>

label element is getting incomplete results