Merge pull request #1391 from simple-keyboard/dependabot/npm_and_yarn/simple-keyboard-3.8.21

Bump simple-keyboard from 3.8.20 to 3.8.21

Author: hodgef

package-lock.json

@@ -48,7 +48,7 @@
     "jest": "^26.1.0",
     "prettier": "^1.19.1",
     "prettier-webpack-plugin": "^1.2.0",
-    "simple-keyboard": "3.8.20",
+    "simple-keyboard": "3.8.21",
     "style-loader": "^4.0.0",
     "url-loader": "^4.1.0",
     "webpack": "^5.97.0",