Bump xterm from 3.8.0 to 3.8.1

Bumps [xterm](https://github.com/xtermjs/xterm.js) from 3.8.0 to 3.8.1.
- [Release notes](https://github.com/xtermjs/xterm.js/releases)
- [Commits](https://github.com/xtermjs/xterm.js/compare/3.8.0...3.8.1)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -23,6 +23,6 @@
     "socket.io": "^2.0.4",
     "thirty-two": "^1.0.2",
     "ws": "^6.1.2",
-    "xterm": "^3.8.0"
+    "xterm": "^3.8.1"
   }
 }

yarn.lock

@@ -614,7 +614,7 @@ ms@2.0.0:
 
 nan@2.10.0:
   version "2.10.0"
-  resolved "http://registry.npmjs.org/nan/-/nan-2.10.0.tgz#96d0cd610ebd58d4b4de9cc0c6828cda99c7548f"
+  resolved "https://registry.npmjs.org/nan/-/nan-2.10.0.tgz#96d0cd610ebd58d4b4de9cc0c6828cda99c7548f"
 
 negotiator@0.6.1:
   version "0.6.1"
@@ -1003,9 +1003,9 @@ xtend@^4.0.0:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.1.tgz#a5c6d532be656e23db820efb943a1f04998d63af"
 
-xterm@^3.8.0:
-  version "3.8.0"
-  resolved "https://registry.yarnpkg.com/xterm/-/xterm-3.8.0.tgz#55d1de518bdc9c9793823f5e4e97d6898972938d"
+xterm@^3.8.1:
+  version "3.8.1"
+  resolved "https://registry.yarnpkg.com/xterm/-/xterm-3.8.1.tgz#0beabaccdc23bd3ab2397c5129ed9b06b0abb167"
 
 yargs@~3.10.0:
   version "3.10.0"