lineSplit does not split horizontal lines that have more than 7 decimals in latitude

Turf Version: 6.3.0

lineSplit does not split horizontal lines whose latitudes have more than 7 decimal places.

For example, the test below fails

test("turf-line-split -- splitting horizontal lines with more than 7 lat decimals", (t) => {
  const x1 = 0
  const x2 = 10;
  const y = 0.12345678;

  const xMid = (x1 + x2)/2;

  const line = lineString([[x1, y], [x2, y]]);
  const splitter = point([xMid, y]);

  const { features } = lineSplit(line, splitter);

  // these fail; real result is an un-split line: lineString([ [ x1, y ], [ x2, y] ])
  t.isEqual(features.length, 2)
  t.deepEquals(features[0], lineString([[x1, y], [xMid, y]]));
  t.deepEquals(features[1], lineString([[xMid, y], [x2, y]]));

  t.end();
})

Start at the lineSplit entry point and reproduce the supplied horizontal-line case with latitude 0.12345678. Add the regression test shown in the issue, then verify that the line is split into two expected features and that the existing lineSplit tests still pass.