Bump xterm from 5.2.0-beta.49 to 5.2.0-beta.53

Bumps [xterm](https://github.com/xtermjs/xterm.js) from 5.2.0-beta.49 to 5.2.0-beta.53.
- [Release notes](https://github.com/xtermjs/xterm.js/releases)
- [Commits](https://github.com/xtermjs/xterm.js/commits)

---
updated-dependencies:
- dependency-name: xterm
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

package.json

@@ -52,7 +52,7 @@
     "pref": "^4.0.1",
     "unescape-js": "^1.1.0",
     "update-electron-app": "^2.0.1",
-    "xterm": "^5.2.0-beta.49",
+    "xterm": "^5.2.0-beta.53",
     "xterm-addon-canvas": "^0.4.0-beta.1",
     "xterm-addon-fit": "^0.7.0",
     "xterm-addon-ligatures": "^0.7.0-beta.1",

yarn.lock

@@ -3089,10 +3089,10 @@ xterm-addon-webgl@^0.15.0-beta.1:
   resolved "https://registry.yarnpkg.com/xterm-addon-webgl/-/xterm-addon-webgl-0.15.0-beta.15.tgz#bc9422425c27ebd86059f6b2465f01c5ec07071a"
   integrity sha512-0zFn6Fsvo7jbSWO2TwNUHlAoceWWb2EYI/SgxN+H6+4kpUV1clP53pTQBdUpAtPEjJsVgxERqOPKBFu14TnR0w==
 
-xterm@^5.2.0-beta.49:
-  version "5.2.0-beta.49"
-  resolved "https://registry.yarnpkg.com/xterm/-/xterm-5.2.0-beta.49.tgz#0c9c176862019800172fc016d136300d1b6531ce"
-  integrity sha512-kfdiYljgAmjM9VpkNuuDcUJJHB62UiSTVZRYJbQdOU7jCi9mnUTPWov+5PnZIgONGts3t3Dv5kdbNF4UH53uTA==
+xterm@^5.2.0-beta.53:
+  version "5.2.0-beta.53"
+  resolved "https://registry.yarnpkg.com/xterm/-/xterm-5.2.0-beta.53.tgz#4a9b618b675f5b6b860a7205c8ff0dfba0879ccd"
+  integrity sha512-REM8Jhffs23MqzF3MxdeODB8cr3ewqULN9Tl9jJdKQOpXBnLXcUKAeGeRVuFyeZYSoXH7fJicX1EJcsW8rPvZw==
 
 y18n@^5.0.5:
   version "5.0.8"