Enable nullable annotations for Volo.Abp.Sms.Aliyun

framework/src/Volo.Abp.Sms.Aliyun/Volo.Abp.Sms.Aliyun.csproj

@@ -4,6 +4,8 @@
 
     <PropertyGroup>
         <TargetFrameworks>netstandard2.0;netstandard2.1;net7.0</TargetFrameworks>
+        <Nullable>enable</Nullable>
+        <WarningsAsErrors>Nullable</WarningsAsErrors>
         <AssemblyName>Volo.Abp.Sms.Aliyun</AssemblyName>
         <PackageId>Volo.Abp.Sms.Aliyun</PackageId>
         <AssetTargetFallback>$(AssetTargetFallback);portable-net45+win8+wp8+wpa81;</AssetTargetFallback>

framework/src/Volo.Abp.Sms.Aliyun/Volo/Abp/Sms/Aliyun/AbpAliyunSmsOptions.cs

@@ -2,9 +2,9 @@ namespace Volo.Abp.Sms.Aliyun;
 
 public class AbpAliyunSmsOptions
 {
-    public string AccessKeySecret { get; set; }
+    public string AccessKeySecret { get; set; } = default!;
 
-    public string AccessKeyId { get; set; }
+    public string AccessKeyId { get; set; } = default!;
 
-    public string EndPoint { get; set; }
+    public string EndPoint { get; set; } = default!;
 }