Uplevel xterm.js

Includes fixes for the terminal breaking when zooming VS Code.

Fixes #18415

npm-shrinkwrap.json

@@ -432,7 +432,7 @@
     "xterm": {
       "version": "2.2.3",
       "from": "git+https://github.com/Tyriar/xterm.js.git#vscode-release/1.9",
-      "resolved": "git+https://github.com/Tyriar/xterm.js.git#8fb0947bf7d2e506b16b5425c71726c25a64475b"
+      "resolved": "git+https://github.com/Tyriar/xterm.js.git#36c63323c3f940636e799ae6e0168b2dfd7a3d21"
     },
     "yauzl": {
       "version": "2.3.1",