message: tools: search for MSBuild in prerelease versions of MSVS
diff: @@ -41,6 +41,13 @@ for /f "usebackq tokens=*" %%B in (`%VSWHERE% -latest -products * -requires Micr
  set MSBUILD=%%B
  )
  +rem Try to find MSBuild in prerelease versions of MSVS
  +if not defined MSBUILD (
  + for /f "usebackq tokens=*" %%B in (`%VSWHERE% -latest -prerelease -products * -requires Microsoft.Component.MSBuild -find MSBuild\**\Bin\MSBuild.exe 2^>nul`) do (
  + set MSBUILD=%%B
  + )
  +)
  +
  if not defined MSBUILD (
  echo Could not find MsBuild on your machine. Please set the MSBUILD variable to the location of MSBuild.exe and run razzle again.
  goto :EXIT
  