5.20.0-alpha.1580

(Minor) BREAKING: Drop support for net462 and update to net472.
ENHANCEMENT: Keep unreleased changelog section when promote to new version, thanks @vilinski - #2480
ENHANCEMENT: Added SignTool for v5, thanks @jhromadik - #2444
ENHANCEMENT: Remove old netstandard1.6 dependencies, thanks @teo-tsirpanis - #2493
ENHANCEMENT: Add support for running Octo as dotnet tool, thanks @jeremyabbott - #2489
ENHANCEMENT: Add support for --include-symbols in dotnet pack, thanks @devployment - #2508
ENHANCEMENT: Add support for default proxy credentials to GitHub (Octokit), thanks @csmager - #2507
ENHANCEMENT: Fake.DotNet.FSFormatting supports the 4.0 RC release
BUGFIX: Update FCS, fixes ionide FAKE support (ionide/FsAutoComplete#561), thanks @baronfel - #2475, #2479, #2481, #2500
BUGFIX: Fix Paket.restore references-files, thanks @nilshelmig - #2474
BUGFIX: Fix/octo args to string bug, thanks @ids-pfinn - #2469
BUGFIX: Fix an AppVeyor environment variable (APPVEYOR_REPO_COMMIT_MESSAGE_EXTENDED) returning null, thanks @teo-tsirpanis - #2448
BUGFIX: Fix potential FileNotFoundException when cache is outdated.
DOCS: Fixed typos and improved docs, thanks @milbrandt, @jzabroski, @objectx - #2492, #2497, #2502