Bump actions/upload-artifact from 2.3.0 to 2.3.1 (#83)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 2.3.0 to 2.3.1.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v2.3.0...v2.3.1)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Merge pull request #62 from lozo2010/master

Add support for multiselect folder browser

Revert "(#86) Embed README in the NuGet package"

Adding the README to the package is currently blocked by
NuGet/Home#10791

This reverts commit 2cacf5e.

Update build script bootstrappers

- Add build.ps1
- Update build.sh to enter the current directory
- Remove default diagnostic verbosity on build.cmd and build.sh

Ookii.Dialogs.Wpf v3.0.1

Ookii.Dialogs.Wpf v3.0.0

Ookii.Dialogs.Wpf v3.0.0-preview1

Ookii.Dialogs.Wpf v2.0.0

Ookii.Dialogs.Wpf v2.0.0-preview1

Ookii.Dialogs.Wpf v1.2.0