really remove versions below 3.6 (#1230) · pythonnet/pythonnet@7c84b10

Original file line number	Diff line number	Diff line change
`@@ -28,7 +28,7 @@`
`28`	`28`	`</ItemGroup>`
`29`	`29`
`30`	`30`	`<Target Name="GetRuntimeLibBuildOutput" BeforeTargets="Build">`
`31`		`-<MSBuild Projects="..\runtime\Python.Runtime.15.csproj" Properties="PYTHONNET_PY3_VERSION=PYTHON35;Configuration=$(Configuration);TargetFramework=net40;Python3Version=PYTHON35;OutputPath=bin\for_perf\">`
	`31`	`+<MSBuild Projects="..\runtime\Python.Runtime.15.csproj" Properties="PYTHONNET_PY3_VERSION=PYTHON38;Configuration=$(Configuration);TargetFramework=net40;Python3Version=PYTHON38;OutputPath=bin\for_perf\">`
`32`	`32`	`<Output TaskParameter="TargetOutputs" ItemName="NewPythonRuntime" />`
`33`	`33`	`</MSBuild>`
`34`	`34`	`</Target>`