Can't parse project with reference to libgit2sharp

Reproduction steps

1. Reference libgit2sharp in the project
2. Call new Microsoft.Build.Evaluation.Project.Project("path/to/.csproj")

Expected behavior

Project parsed successfully

Actual behavior

Microsoft.Build.Exceptions.InvalidProjectFileException: The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format. c:\root\packages\LibGit2Sharp.NativeBinaries.1.0.217\build\net461\LibGit2Sharp.NativeBinaries.props

Version of LibGit2Sharp (release number or SHA1)

0.25.2

Operating system(s) tested; .NET runtime tested

Windows Server 2016
.NET 4.6.1

首先，在 Windows Server 2016 上使用 .NET 4.6.1 重現 Microsoft.Build.Evaluation.Project.Project 呼叫，然後檢查 LibGit2Sharp.NativeBinaries.1.0.217/build/net461/LibGit2Sharp.NativeBinaries.props。當參考 LibGit2Sharp 時專案能夠成功解析，且不會出現 InvalidProjectFileException，即表示完成。