Update float parsing

Update float parsing using InvariantCulture to not depend on OS language to parse float value.
Usefull for French, German, ... users where comma is default notations for the decimal point parsing.

unity/Runtime/Tools/XmlElementExtensions.cs

@@ -15,6 +15,7 @@
 using System;
 using System.Linq;
 using System.Xml;
+using System.Globalization;
 using UnityEngine;
 
 namespace Mujoco {
@@ -43,7 +44,7 @@ public static class XmlElementExtensions {
     }
     var strValue = element.GetAttribute(name);
     float parsedValue;
-    if (float.TryParse(strValue, out parsedValue)) {
+    if (float.TryParse(strValue, NumberStyles.Any, CultureInfo.InvariantCulture, out parsedValue)) {
       return parsedValue;
     } else {
       throw new ArgumentException($"'{strValue}' is not a float.");
@@ -151,7 +152,7 @@ public static class XmlElementExtensions {
     var result = new float[resultLength];
     for (var i = 0; i < components.Length; ++i) {
       float componentValue;
-      if (float.TryParse(components[i], out componentValue)) {
+      if (float.TryParse(components[i], NumberStyles.Any, CultureInfo.InvariantCulture, out componentValue)) {
         result[i] = componentValue;
       } else {
         throw new ArgumentException($"'{components[i]}' is not a float.");