Fake.Core.FakeVar 5.16.0

LEGACY: Remove `Fake.Deploy` from repository and NuGet package, see https://github.com/fsharp/FAKE/issues/1820 LEGACY: Update to `net461` to support latest `FSharp.Compiler.Service` to fix https://github.com/fsharp/FAKE/issues/2362 LEGACY: Release a new version of `FakeLib.dll` (the original FAKE NuGet package) BUGFIX: Fake.Api.Slack uses `Username` not `From`, thanks @mastion - https://github.com/fsharp/FAKE/pull/2360 ENHANCEMENT: add rollforward policy to next-major to make `fake-cli` work in future dotnet sdk major version, thanks @baronfel - https://github.com/fsharp/FAKE/pull/2372 ENHANCEMENT: `ProcessUtils` now considers `PATHEXT` on windows - https://github.com/fsharp/FAKE/pull/2368 ENHANCEMENT: [`Fake.Api.GitHub`] Added `TargetCommitish` parameter to the `CreateReleaseParams` record. This parameter is passed to Octokit's 'NewRelease', and allows for the creation of releases from arbitrary commits when the release tag does not exist yet, thanks @nikolamilekic - https://github.com/fsharp/FAKE/pull/2367 (Minor) BREAKING: Drop support for `netstandard1.6` and `net46` (please open an issue if that actually hits you). All fake modules are now compiled for `netstandard2.0`, `net462` and `FSharp.Core 4.7`, you should consider to upgrade your runtime. ENHANCEMENT: `Fake.DotNet.Fsc` and `Fake.DotNet.Fsi` now use latest `FSharp.Compiler.Service` ENHANCEMENT: The fake runtime now supports `FSharp.Core 4.7`, thanks @drssoccer55 - https://github.com/fsharp/FAKE/pull/2373