LottieGen.MSBuild props file has invalid path to DLL #443

Directory structure of the nuget package looks like:

• bin\
  • LottieGen.MsBuild.dll
• build\
  • native\
    • LottieGen.MsBuild.props
  • win\
    • LottieGen.MsBuild.props

LottieGen.MsBuild.props:

<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <UsingTask
    TaskName="LottieGen.Task.LottieGen"
    AssemblyFile="$(MsBuildThisFileDirectory)..\bin\LottieGen.MsBuild.dll"/>
</Project>

The path should read $(MsBuildThisFileDirectory)..\..\bin\LottieGen.MsBuild.dll