File scoped namespaces isn't supported in current Csharp version

It was added at Csharp 10:
https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/proposals/csharp-10.0/file-scoped-namespaces

Assets/BytecodeAlliance/WasmtimeDotNet/Delegates.cs

@@ -1,4 +1,5 @@
-namespace Wasmtime;
+namespace Wasmtime
+{
 
 /// <summary>
 /// Action accepting a caller
@@ -130,3 +131,4 @@
 /// </summary>
 public delegate TResult CallerFunc<in T1, in T2, in T3, in T4, in T5, in T6, in T7, in T8, in T9, in T10, in T11, in T12, out TResult>(Caller caller, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8, T9 arg9, T10 arg10, T11 arg11, T12 arg12);
 
+}