Fixing the undesirable dependencies issue for qdk (#771)

* Migrated to net6.0.

Author: kuzminrobin

samples/interoperability/dotnet/qsharp/qsharp.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Library</OutputType>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
   </PropertyGroup>
 
 </Project>

samples/interoperability/python/python-qsharp-interop.ipynb

@@ -386,7 +386,7 @@
       "\n",
       "  <PropertyGroup>\n",
       "    <OutputType>Library</OutputType>\n",
-      "    <TargetFramework>netstandard2.1</TargetFramework>\n",
+      "    <TargetFramework>net6.0</TargetFramework>\n",
       "    <!-- This property tells the qsharp package to automatically load\n",
       "         your project and use it as a workspace. -->\n",
       "    <IQSharpLoadAutomatically>true</IQSharpLoadAutomatically>\n",

samples/interoperability/python/python.csproj

@@ -4,7 +4,7 @@
 
   <PropertyGroup>
     <OutputType>Library</OutputType>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
     <!-- This property tells the qsharp package to automatically load
          your project and use it as a workspace. -->
     <IQSharpLoadAutomatically>true</IQSharpLoadAutomatically>

samples/runtime/qpic-simulator/simulator/simulator.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.Quantum.Sdk/0.27.253010">
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
     <OutputType>Library</OutputType>
   </PropertyGroup>
 </Project>