Prepare release 1.6.0 (#899)

Author: gregkalapos

CHANGELOG.asciidoc

@@ -21,6 +21,23 @@ endif::[]
 [[release-notes-1.x]]
 === .NET Agent version 1.x
 
+[[release-notes-1.6.0]]
+==== 1.6.0
+
+[float]
+===== Features
+- Elasticsearch client instrumentation {pull}329[#329]
+- Introducing `Elastic.Apm.Extensions.Hosting` package with an extension method on `IHostBuilder` {pull}537[#537]
+- Stack trace improvements: async call stack demystification ({pull}847[#847]) and showing frames from user code for outgoing HTTP calls ({pull}845[#845]) 
+- Making fields on `IError` public {pull}847[#847]
+- Service map improvements: {pull}893[#893]
+
+[float]
+===== Bug fixes
+- Missing traces from the Kibana traces list due to setting `Transaction.ParentId` to an `Activity` {pull}888[#888]
+- Exception around runtime detection {pull}859[#859]
+- Missing outgoing HTTP calls in .NET Framework applications and causing memory issues {pull}896[#896]
+
 [[release-notes-1.5.1]]
 ==== 1.5.1
 

src/Directory.Build.props

@@ -2,11 +2,11 @@
   <!-- Src Directory Build Properties -->
   <Import Project="$([MSBuild]::GetPathOfFileAbove('Directory.Build.props', '$(MSBuildThisFileDirectory)../'))" />
   <PropertyGroup>
-    <AssemblyVersion>1.5.1</AssemblyVersion>
-    <InformationalVersion>1.5.1</InformationalVersion>
-    <FileVersion>1.5.1</FileVersion>
+    <AssemblyVersion>1.6.0</AssemblyVersion>
+    <InformationalVersion>1.6.0</InformationalVersion>
+    <FileVersion>1.6.0</FileVersion>
 
-    <VersionPrefix>1.5.1</VersionPrefix>
+    <VersionPrefix>1.6.0</VersionPrefix>
     <Authors>Elastic and contributors</Authors>
     <Copyright>2020 Elasticsearch BV</Copyright>
     <PackageLicenseUrl>https://github.com/elastic/apm-agent-dotnet/blob/master/LICENSE</PackageLicenseUrl>