CSHARP-4153: Nuget changes.

Author: DmitryLukyanov

.gitignore

@@ -47,7 +47,7 @@ Help
 src/packages
 
 # Nupkg artifacts
-*.nupkg
+#*.nupkg
 
 # NCrunch artifacts
 *.ncrunch*

NuGet.config

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+  <configuration>  
+	<packageSources>
+	  <add key="LocalPackages" value="libs" />
+	</packageSources>
+	<activePackageSource>
+	  <!-- this tells that all of them are active -->
+	  <add key="All" value="(Aggregate source)" />
+	</activePackageSource> 
+ </configuration>

libs/MongoDB.Libmongocrypt.1.5.2.nupkg

@@ -177,7 +177,7 @@
   <ItemGroup>
     <PackageReference Include="DnsClient" Version="1.6.0" />
     <PackageReference Include="Microsoft.CodeAnalysis.FxCopAnalyzers" Version="2.6.2" PrivateAssets="All" />
-    <PackageReference Include="MongoDB.Libmongocrypt" Version="1.3.0" />
+    <PackageReference Include="MongoDB.Libmongocrypt" Version="1.5.2" />
     <PackageReference Include="SharpCompress" Version="0.30.1" />
     <PackageReference Include="System.Buffers" Version="4.5.1" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1">

libs/MongoDB.Libmongocrypt.1.5.2.symbols.nupkg

@@ -48,7 +48,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis.FxCopAnalyzers" Version="2.6.2" PrivateAssets="All" />
-    <PackageReference Include="MongoDB.Libmongocrypt" Version="1.3.0" />
+    <PackageReference Include="MongoDB.Libmongocrypt" Version="1.5.2" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>