fix(package.json): added conventional commit messages

Author: FDiskas

package.json

@@ -72,7 +72,7 @@
     }
   },
   "scripts": {
-    "cm": "git-cz",
+    "cm": "git diff-index --cached --quiet HEAD || git-cz",
     "vscode:prepublish": "yarn run compile",
     "compile": "tsc -p ./",
     "lint": "eslint src --ext ts",
@@ -90,6 +90,7 @@
     "@types/vscode": "^1.42.0",
     "@typescript-eslint/eslint-plugin": "^2.18.0",
     "@typescript-eslint/parser": "^2.18.0",
+    "conventional-changelog-cli": "^2.0.31",
     "cz-conventional-changelog": "^3.1.0",
     "eslint": "^6.8.0",
     "glob": "^7.1.6",