Upgrade to NBitcoin 4.2.8, remove Http workaround

- Update NBitcoin.Altcoins too (released with NBitcoin)
- Remove Version attribute from PackageReferences of System.Net.Http
- Remove package.config references of System.Net.Http
- Remove binding redirect of System.Net.Http

The new NBitcoin version is the first version that has
System.Net.Http removed.

See https://github.com/dotnet/corefx/issues/19914#issuecomment-529113925

Author: ysangkok

src/GWallet.Backend.Tests/GWallet.Backend.Tests.fsproj

@@ -114,13 +114,13 @@
       <HintPath>..\..\packages\FSharp.Core.4.7.0\lib\net45\FSharp.Core.dll</HintPath>
     </Reference>
     <Reference Include="NBitcoin.Altcoins">
-      <HintPath>..\..\packages\NBitcoin.Altcoins.1.0.1.35\lib\net452\NBitcoin.Altcoins.dll</HintPath>
+      <HintPath>..\..\packages\NBitcoin.Altcoins.1.0.3\lib\net452\NBitcoin.Altcoins.dll</HintPath>
     </Reference>
     <Reference Include="Microsoft.Extensions.Logging.Abstractions">
       <HintPath>..\..\packages\Microsoft.Extensions.Logging.Abstractions.1.0.2\lib\netstandard1.1\Microsoft.Extensions.Logging.Abstractions.dll</HintPath>
     </Reference>
     <Reference Include="NBitcoin">
-      <HintPath>..\..\packages\NBitcoin.4.1.1.80\lib\net452\NBitcoin.dll</HintPath>
+      <HintPath>..\..\packages\NBitcoin.4.2.8\lib\net461\NBitcoin.dll</HintPath>
     </Reference>
   </ItemGroup>
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 

src/GWallet.Backend.Tests/packages.config

@@ -3,8 +3,8 @@
   <package id="BouncyCastle" version="1.8.2" targetFramework="net46" />
   <package id="FSharp.Core" version="4.7.0" targetFramework="net461" />
   <package id="Microsoft.Extensions.Logging.Abstractions" version="1.0.2" targetFramework="net46" />
-  <package id="NBitcoin" version="4.1.1.80" targetFramework="net46" />
-  <package id="NBitcoin.Altcoins" version="1.0.1.35" targetFramework="net46" />
+  <package id="NBitcoin" version="4.2.8" targetFramework="net461" />
+  <package id="NBitcoin.Altcoins" version="1.0.3" targetFramework="net452" />
   <package id="Newtonsoft.Json" version="11.0.2" targetFramework="net46" />
   <package id="NUnit" version="2.6.4" targetFramework="net46" />
   <package id="NUnitTestAdapter" version="2.1.1" targetFramework="net46" />

src/GWallet.Backend/GWallet.Backend.fsproj

@@ -140,14 +140,12 @@
     <Reference Include="System.Security.Cryptography.X509Certificates">
       <HintPath>..\..\packages\System.Security.Cryptography.X509Certificates.4.3.0\lib\net46\System.Security.Cryptography.X509Certificates.dll</HintPath>
     </Reference>
-    <Reference Include="System.Net.Http">
-      <HintPath>..\..\packages\System.Net.Http.4.3.3\lib\net46\System.Net.Http.dll</HintPath>
-    </Reference>
+    <Reference Include="System.Net.Http" />
     <Reference Include="NBitcoin.Altcoins">
-      <HintPath>..\..\packages\NBitcoin.Altcoins.1.0.1.35\lib\net452\NBitcoin.Altcoins.dll</HintPath>
+      <HintPath>..\..\packages\NBitcoin.Altcoins.1.0.3\lib\net452\NBitcoin.Altcoins.dll</HintPath>
     </Reference>
     <Reference Include="NBitcoin">
-      <HintPath>..\..\packages\NBitcoin.4.1.1.80\lib\net452\NBitcoin.dll</HintPath>
+      <HintPath>..\..\packages\NBitcoin.4.2.8\lib\net461\NBitcoin.dll</HintPath>
     </Reference>
     <Reference Include="System.Threading.Tasks.Extensions">
       <HintPath>..\..\packages\System.Threading.Tasks.Extensions.4.5.1\lib\portable-net45+win8+wp8+wpa81\System.Threading.Tasks.Extensions.dll</HintPath>

src/GWallet.Backend/packages.config

@@ -10,8 +10,8 @@
   <package id="Microsoft.Extensions.Logging.Abstractions" version="1.0.2" targetFramework="net46" />
   <package id="Microsoft.NETCore.Platforms" version="1.1.0" targetFramework="net46" />
   <package id="Microsoft.Win32.Primitives" version="4.3.0" targetFramework="net46" />
-  <package id="NBitcoin" version="4.1.1.80" targetFramework="net46" />
-  <package id="NBitcoin.Altcoins" version="1.0.1.35" targetFramework="net46" />
+  <package id="NBitcoin" version="4.2.8" targetFramework="net461" />
+  <package id="NBitcoin.Altcoins" version="1.0.3" targetFramework="net452" />
   <package id="Nethereum" version="0.10.0-date20191211-1241.git-be6d117" targetFramework="net461" />
   <package id="NETStandard.Library" version="1.6.1" targetFramework="net46" />
   <package id="Newtonsoft.Json" version="11.0.2" targetFramework="net46" />
@@ -36,7 +36,6 @@
   <package id="System.Linq" version="4.3.0" targetFramework="net46" />
   <package id="System.Linq.Expressions" version="4.3.0" targetFramework="net46" />
   <package id="System.Memory" version="4.5.1" targetFramework="net46" />
-  <package id="System.Net.Http" version="4.3.3" targetFramework="net46" />
   <package id="System.Net.Primitives" version="4.3.0" targetFramework="net46" />
   <package id="System.Net.Requests" version="4.3.0" targetFramework="net46" />
   <package id="System.Net.Sockets" version="4.3.0" targetFramework="net46" />

src/GWallet.Frontend.Console/App.config

@@ -10,14 +10,6 @@
                 <assemblyIdentity name="System.Buffers" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
                 <bindingRedirect oldVersion="0.0.0.0-4.0.2.0" newVersion="4.0.3.0"/>
             </dependentAssembly>
-
-            <!-- workaround to issue https://github.com/dotnet/corefx/issues/19914 ,
-                 along with the removal of System.Net.Http.dll in an AfterBuild step -->
-            <dependentAssembly>
-                <assemblyIdentity name="System.Net.Http" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-                <bindingRedirect oldVersion="0.0.0.0-4.3.3.0" newVersion="4.0.0.0" />
-            </dependentAssembly>
-
         </assemblyBinding>
     </runtime>
     <startup>