Bump xlsx from 0.15.3 to 0.15.4

dependabot-preview[bot] · web-flow · commit cdd4d87fb7a8 · 2019-12-24T02:38:25.000Z
Bumps [xlsx](https://github.com/SheetJS/js-xlsx) from 0.15.3 to 0.15.4. - [Release notes](https://github.com/SheetJS/js-xlsx/releases) - [Changelog](https://github.com/SheetJS/sheetjs/blob/master/CHANGELOG.md) - [Commits](https://github.com/SheetJS/js-xlsx/commits) Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
diff --git a/package.json b/package.json
@@ -131,7 +131,7 @@
     "proj4": "2.6.0",
     "promise-polyfill": "8.1.3",
     "three": "0.92.0",
-    "xlsx": "0.15.3",
+    "xlsx": "0.15.4",
     "xml-js": "1.6.11"
   },
   "pre-commit": [
