Julia:Execute File behaves differently than include()

Repost of: https://discourse.julialang.org/t/vs-code-julia-execute-file-workflow/42145

This file ("err.jl"):
```
function f()
  error("some error")
end

f()
```
produces a blank line when run with Julia:Execute File. When run with REPL:
```
julia> include("err.jl")
ERROR: some error
```
it behaves as expected. Tested with Julia v1.4.2 and VS Code extension v0.16.8.