Merge branch 'develop' of https://github.com/opensheetmusicdisplay/opensheetmusicdisplay into develop

package.json

@@ -63,7 +63,7 @@
     "chai": "^4.1.0",
     "clean-webpack-plugin": "^1.0.1",
     "cross-env": "^5.1.3",
-    "cz-conventional-changelog": "^2.0.0",
+    "cz-conventional-changelog": "^3.0.0",
     "eslint": "^5.15.3",
     "eslint-config-standard": "^12.0.0",
     "eslint-plugin-import": "^2.16.0",