Bump keycon from 1.1.2 to 1.4.0

Bumps [keycon](https://github.com/daybrush/keycon) from 1.1.2 to 1.4.0.
- [Release notes](https://github.com/daybrush/keycon/releases)
- [Changelog](https://github.com/daybrush/keycon/blob/master/CHANGELOG.md)
- [Commits](https://github.com/daybrush/keycon/compare/1.1.2...keycon@1.4.0)

---
updated-dependencies:
- dependency-name: keycon
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -32,7 +32,7 @@
         "howler": "^2.2.3",
         "intersects": "^2.7.2",
         "joypad.js": "^2.2.5",
-        "keycon": "^1.1.2",
+        "keycon": "^1.4.0",
         "pixi-filters": "^4.1.4",
         "pixi-game-camera": "^1.0.2",
         "pixi-tween": "^0.2.0",