Merge pull request #689 from opensheetmusicdisplay/greenkeeper/@types/node-13.9.0

chore(package): update @types/node to version 13.9.0

package.json

@@ -73,7 +73,7 @@
   "devDependencies": {
     "@types/chai": "^4.2.10",
     "@types/mocha": "^7.0.2",
-    "@types/node": "^13.7.4",
+    "@types/node": "^13.9.0",
     "canvas": "^2.6.1",
     "chai": "^4.1.0",
     "clean-webpack-plugin": "^1.0.1",