propertyValue (prop, value) {
    const possiblePrefixableValues =
      prefixes.remove[prop.toLowerCase()] &&
      prefixes.remove[prop.toLowerCase()].values;
    return (
      possiblePrefixableValues &&
      possiblePrefixableValues.some(valueObj => {
        return value.toLowerCase() === valueObj.prefixed;
      })
    );
  }
Check a property value to see if it should be prefixed

@param {string} prop The property this value belongs to
@param {string} value The value we want to check
@returns {boolean} Whether our value should be prefixed or not