Use INumberBase<T>.CreateChecked on .NET 7+ (#1518)

Implementing change suggested in #1483 .

Author: andrewimcclement

CodeGen/Generators/UnitsNetGen/NumberExtensionsGenerator.cs

@@ -49,8 +49,11 @@ public static class NumberTo{_quantityName}Extensions
             where T : notnull
 #if NET7_0_OR_GREATER
             , INumber<T>
+            => {_quantityName}.From{unit.PluralName}(double.CreateChecked(value));
+#else
+            , IConvertible
+            => {_quantityName}.From{unit.PluralName}(value.ToDouble(null));
 #endif
-            => {_quantityName}.From{unit.PluralName}(Convert.ToDouble(value));
 ");
             }
 

UnitsNet.NumberExtensions.Tests/UnitsNet.NumberExtensions.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFrameworks>net48;net8.0</TargetFrameworks>
     <RootNamespace>UnitsNet.NumberExtensions.Tests</RootNamespace>
     <LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>