Uplevel xterm.js

This brings in:

- eraseRight/Left null exception
- Animation frame idle performance
- Pull renderer out

Fixes Microsoft/vscode#19640
Part of Microsoft/vscode#12000
Fixes Microsoft/vscode#19651

npm-shrinkwrap.json

@@ -431,8 +431,8 @@
     },
     "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#27f7052106825b7e2e89358bed84bb1a285d7aaf"
+      "from": "git+https://github.com/Tyriar/xterm.js.git#vscode-release/1.10",
+      "resolved": "git+https://github.com/Tyriar/xterm.js.git#90cd66bf353b86ad52d7b650760d8d879dd1c7b8"
     },
     "yauzl": {
       "version": "2.3.1",

package.json

@@ -35,7 +35,7 @@
     "vscode-debugprotocol": "1.16.0",
     "vscode-textmate": "3.1.0",
     "winreg": "1.2.0",
-    "xterm": "git+https://github.com/Tyriar/xterm.js.git#vscode-release/1.9",
+    "xterm": "git+https://github.com/Tyriar/xterm.js.git#vscode-release/1.10",
     "yauzl": "2.3.1"
   },
   "devDependencies": {