Add Mach speed unit (#1104)

Standard conversion at 20C and 1atm

Co-authored-by: Terry Farnham <[email protected]>

Author: tjrtfarnham

Common/UnitDefinitions/Speed.json

@@ -313,6 +313,22 @@
           "Abbreviations": [ "миль/ч" ]
         }
       ]
+    },
+    {
+      "SingularName": "Mach",
+      "PluralName": "Mach",
+      "FromUnitToBaseFunc": "{x} * 340.29",
+      "FromBaseToUnitFunc": "{x} / 340.29",
+      "Localization": [
+        {
+          "Culture": "en-US",
+          "Abbreviations": [ "M", "Ma", "MN", "MACH" ]
+        },
+		    {
+          "Culture": "ru-RU",
+          "Abbreviations": [ "мах" ]
+        }
+      ]
     }
   ]
 }

Common/UnitEnumValues.g.json

@@ -1343,7 +1343,8 @@
     "UsSurveyFootPerSecond": 29,
     "YardPerHour": 30,
     "YardPerMinute": 31,
-    "YardPerSecond": 32
+    "YardPerSecond": 32,
+    "Mach": 42
   },
   "StandardVolumeFlow": {
     "StandardCubicCentimeterPerMinute": 1,

UnitsNet.NanoFramework/GeneratedCode/Quantities/Speed.g.cs

@@ -73,6 +73,8 @@ public class SpeedTests : SpeedTestsBase
 
         protected override double UsSurveyFeetPerHourInOneMeterPerSecond => 1.1811E4;
 
+        protected override double MachInOneMeterPerSecond =>2.9386699579770E-3;
+
         [Fact]
         public void DurationSpeedTimesEqualsLength()
         {