bumping js-slang (source-academy#1097)

Author: martin-henz

package-lock.json

@@ -47,7 +47,7 @@
     "draft-js": "^0.10.5",
     "flexboxgrid": "^6.3.1",
     "flexboxgrid-helpers": "^1.1.3",
-    "js-slang": "^0.4.43",
+    "js-slang": "^0.4.44",
     "jwt-decode": "^2.2.0",
     "lodash": "^4.17.15",
     "lz-string": "^1.4.4",