Fix: @turf/nearest-point-on-line failing test

After changes, tests in @turf/point-to-polygon-distance were failing.
Issue confirmed to be due to single bit floating point difference and
updated to new output value.

Also fixed partially missing comment.

Author: bratter

packages/turf-nearest-point-on-line/index.ts

@@ -171,7 +171,8 @@ function lngLatToVector(a: Position): Vector {
 function vectorToLngLat(v: Vector): Position {
   const [x, y, z] = v;
   // Clamp the z-value to ensure that is inside the [-1, 1] domain as required
-  // by asin. Note that
+  // by asin. Note therefore that this function should only be applied to unit
+  // vectors so z > 1 should not exist
   const zClamp = Math.min(Math.max(z, -1), 1);
   const lat = radiansToDegrees(Math.asin(zClamp));
   const lng = radiansToDegrees(Math.atan2(y, x));

packages/turf-point-to-polygon-distance/test_fixtures/multi-polygon.geojson

@@ -5,7 +5,7 @@
       "type": "Feature",
       "properties": {
         "name": "outer",
-        "expected_distance": 22.10311139107688,
+        "expected_distance": 22.10311139186459,
         "units": "meters"
       },
       "geometry": {
@@ -53,7 +53,7 @@
       "type": "Feature",
       "properties": {
         "name": "in-hole-close-to-poly-in-hole",
-        "expected_distance": 16.36078019912375,
+        "expected_distance": 16.360780198687877,
         "units": "meters"
       },
       "geometry": {