Update to latest Exceptionless. Add netstandard2.0 target.

Author: ejsmith

.vscode/tasks.json

@@ -0,0 +1,20 @@
+{
+    // See https://go.microsoft.com/fwlink/?LinkId=733558
+    // for the documentation about the tasks.json format
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "taskName": "build",
+            "command": "dotnet build",
+            "type": "shell",
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "presentation": {
+                "reveal": "always"
+            },
+            "problemMatcher": "$msCompile"
+        }
+    ]
+}

NuGet.config

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <packageSources>
+        <add key="Exceptionless" value="https://www.myget.org/F/exceptionless/api/v3/index.json" />
+    </packageSources>
+</configuration>

src/Serilog.Sinks.Exceptionless/Serilog.Sinks.Exceptionless.csproj

@@ -4,7 +4,7 @@
     <Description>Exceptionless sink for Serilog</Description>
     <VersionPrefix>3.0.4</VersionPrefix>
     <Authors>Serilog Contributors</Authors>
-    <TargetFrameworks>net45;netstandard1.2</TargetFrameworks>
+    <TargetFrameworks>net45;netstandard1.2;netstandard2.0</TargetFrameworks>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -34,7 +34,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Exceptionless.Signed" Version="4.0.1951" />
+    <PackageReference Include="Exceptionless.Signed" Version="4.1.1967-pre" />
     <PackageReference Include="Serilog" Version="2.5.0" />
   </ItemGroup>