Emoji are displayed incorrectly in terminal

[FallenGameR]

Issue Type: Bug

From a python script do print("🛹") or any other output involving emoji. When the script is output to the VS Code terminal you would see a variation of '?' char prepended. This doesn't happen in Windows Terminal.

VS Code version: Code 1.46.1 (cd9ea64, 2020-06-17T21:13:20.174Z)
OS version: Windows_NT x64 10.0.18363

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz (8 x 2112)
GPU Status	2d_canvas: enabled flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: disabled_off protected_video_decode: enabled rasterization: enabled skia_renderer: disabled_off_ok video_decode: enabled viz_display_compositor: enabled_on viz_hit_test_surface_layer: disabled_off_ok webgl: enabled webgl2: enabled
Load (avg)	undefined
Memory (System)	15.92GB (6.26GB free)
Process Argv
Screen Reader	no
VM	0%

Extensions (13)

Extension	Author (truncated)	Version
code-gnu-global	aus	0.2.2
unique-lines	bib	1.0.0
bracket-pair-colorizer	Coe	1.0.61
gitlens	eam	10.2.2
search-editor-apply-changes	jak	0.1.1
markdown-shortcuts	mdi	0.12.0
python	ms-	2020.6.89148
remote-wsl	ms-	0.44.4
cpptools	ms-	0.28.3
hexeditor	ms-	1.0.1
powershell	ms-	2020.6.0
material-icon-theme	PKi	4.2.0
code-settings-sync	Sha	3.4.3

[Tyriar]

/duplicate xtermjs/xterm.js#2693