Bump version and update changelog (#76)

Author: blackchoey

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 [![Nuget](https://img.shields.io/nuget/v/Microsoft.Azure.IoT.Edge.Module.svg)](https://www.nuget.org/packages/Microsoft.Azure.IoT.Edge.Module/)
 
-### 3.1.0
+### 3.1.0 (2020-04-07)
 * [Updated] Add arm64v8 and arm64v8.debug dockerfiles
 * [Updated] Upgrade .Net Core SDK to 3.1
 

Microsoft.Azure.IoT.Edge.Module.nuspec

@@ -2,7 +2,7 @@
 <package>
     <metadata>
     <id>Microsoft.Azure.IoT.Edge.Module</id>
-    <version>3.1.0-RC2</version>
+    <version>3.1.0</version>
     <title>Azure IoT Edge Module</title>
     <authors>Microsoft</authors>
     <owners>microsoft, nugetazureiotedge</owners>