How to release a new version

Change version and assembly_informational_version in appveyor.yml, according to semver.

Only change assembly_version which each major version!

Wait for build completion on AppVeyor.
Push to NuGet by in AppVeyor:
Chooser "deployments"
Hover "Nuget.org & SymbolSource.org" and press "update"
Hover proper build and press "publish"
Check/update changelog in NuGet (if you have proper rights)
Create a GitHub release. (tag should start with v). Copy (and edit) changelog from NuGet
Close GitHub milestone
Optional: Twitter