update TargetFrameworks with single .net standard 2.0 TargetFramework.

src/DotNetCore.CAP.Kafka/DotNetCore.CAP.Kafka.csproj

@@ -3,7 +3,7 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;</TargetFrameworks>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>DotNetCore.CAP.Kafka</AssemblyName>
     <PackageTags>$(PackageTags);Kafka</PackageTags>
   </PropertyGroup>

src/DotNetCore.CAP.MySql/DotNetCore.CAP.MySql.csproj

@@ -3,7 +3,7 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;</TargetFrameworks>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>DotNetCore.CAP.MySql</AssemblyName>
     <PackageTags>$(PackageTags);MySQL</PackageTags>
   </PropertyGroup>

src/DotNetCore.CAP.PostgreSql/DotNetCore.CAP.PostgreSql.csproj

@@ -3,7 +3,7 @@
   <Import Project="..\..\build\common.props" />
   
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;</TargetFrameworks>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>DotNetCore.CAP.PostgreSql</AssemblyName>
     <PackageTags>$(PackageTags);PostgreSQL</PackageTags>
   </PropertyGroup>

src/DotNetCore.CAP.RabbitMQ/DotNetCore.CAP.RabbitMQ.csproj

@@ -3,7 +3,7 @@
   <Import Project="..\..\build\common.props" />
   
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;</TargetFrameworks>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>DotNetCore.CAP.RabbitMQ</AssemblyName>
     <PackageTags>$(PackageTags);RabbitMQ</PackageTags>
   </PropertyGroup>

src/DotNetCore.CAP.SqlServer/DotNetCore.CAP.SqlServer.csproj

@@ -3,7 +3,7 @@
   <Import Project="..\..\build\common.props" />
   
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;</TargetFrameworks>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>DotNetCore.CAP.SqlServer</AssemblyName>
     <PackageTags>$(PackageTags);SQL Server</PackageTags>
   </PropertyGroup>

src/DotNetCore.CAP/DotNetCore.CAP.csproj

@@ -3,7 +3,7 @@
   <Import Project="..\..\build\common.props" />
   
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;</TargetFrameworks>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>DotNetCore.CAP</AssemblyName>
     <PackageTags>$(PackageTags);</PackageTags>
   </PropertyGroup>