Fork from https://github.com/stovmascript/ionic-version and updated for ionic-4 usage.

Install

npm i ionic-4-version --save -dev

Example hook to npm version in inpackage.json

...
"scripts": {
	...
	"version": "ionic-version --skip-tag && conventional-changelog -i CHANGELOG.md -s && git add CHANGELOG.md"
}
...

Many thanks to original ionic-version author.