chore: auto-bump changelog version on release

Author: lodev09

package.json

@@ -188,7 +188,8 @@
       "before:init": [
         "yarn tidy",
         "yarn test"
-      ]
+      ],
+      "after:bump": "sed -i '' 's/## Unreleased/## Unreleased\\n\\n## ${version}/' CHANGELOG.md && git add CHANGELOG.md"
     },
     "github": {
       "release": true,