downgrade dependencies to be netstandard 1.3 compliant and remove net461 shim requirement

Build/MQTTnet.nuspec

@@ -18,10 +18,10 @@
     <dependencies>
 
       <group targetFramework="netstandard1.3">
-        <dependency id="NETStandard.Library" version="1.6.1" />
-        <dependency id="Microsoft.Extensions.DependencyInjection" version="1.1.1" />
-        <dependency id="Microsoft.Extensions.Logging" version="1.1.2" />
-        <dependency id="Microsoft.Extensions.Options" version="1.1.2" />
+        <dependency id="NETStandard.Library" version="1.3.0" />
+        <dependency id="Microsoft.Extensions.DependencyInjection" version="1.0.2" />
+        <dependency id="Microsoft.Extensions.Logging" version="1.0.2" />
+        <dependency id="Microsoft.Extensions.Options" version="1.0.2" />
         <dependency id="System.Net.Security" version="4.3.2" />
         <dependency id="System.Net.WebSockets" version="4.3.0" />
         <dependency id="System.Net.WebSockets.Client" version="4.3.1" />
@@ -47,9 +47,9 @@
       </group>
         
       <group targetFramework="net452">
-        <dependency id="Microsoft.Extensions.DependencyInjection" version="1.1.1" />
-        <dependency id="Microsoft.Extensions.Logging" version="1.1.2" />
-        <dependency id="Microsoft.Extensions.Options" version="1.1.2" />
+        <dependency id="Microsoft.Extensions.DependencyInjection" version="1.0.2" />
+        <dependency id="Microsoft.Extensions.Logging" version="1.0.2" />
+        <dependency id="Microsoft.Extensions.Options" version="1.0.2" />
       </group>
 
     </dependencies>

Frameworks/MQTTnet.NetStandard/MQTTnet.Netstandard.csproj

@@ -53,8 +53,8 @@
     <PackageReference Include="System.Net.WebSockets" Version="4.3.0" />
     <PackageReference Include="System.Net.WebSockets.Client" Version="4.3.1" />
     <PackageReference Include="System.Threading.Thread" Version="4.3.0" />
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="1.1.1" />
-    <PackageReference Include="Microsoft.Extensions.Logging" Version="1.1.2" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="1.0.2" />
+    <PackageReference Include="Microsoft.Extensions.Logging" Version="1.0.2" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)'=='uap10.0'">
@@ -64,8 +64,8 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)'=='net452'">
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="1.1.1" />
-    <PackageReference Include="Microsoft.Extensions.Logging" Version="1.1.2" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="1.0.2" />
+    <PackageReference Include="Microsoft.Extensions.Logging" Version="1.0.2" />
   </ItemGroup>
 
 </Project>

MQTTnet.Core/MQTTnet.Core.csproj

@@ -23,8 +23,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="1.1.2" />
-    <PackageReference Include="Microsoft.Extensions.Options" Version="1.1.2" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="1.0.2" />
+    <PackageReference Include="Microsoft.Extensions.Options" Version="1.0.2" />
     <PackageReference Include="System.Threading" Version="4.3.0" />
   </ItemGroup>