package.json 中的version可以手动修改，也可以通过npm命令管理

{
  "version": "0.0.1"
}

查看帮助

$ npm version -h
npm version

Bump a package version

Usage:
npm version [<newversion> | major | minor | patch | premajor | preminor | prepatch | prerelease | from-git]

Options:
[--allow-same-version] [--no-commit-hooks] [--no-git-tag-version] [--json]
[--preid prerelease-id] [--sign-git-tag]
[-w|--workspace <workspace-name> [-w|--workspace <workspace-name> ...]]
[-ws|--workspaces] [--include-workspace-root]

alias: verison

Run "npm help version" for more

使用示例

$ npm version major
v1.0.0
$ npm version minor
v1.1.0
$ npm version patch
v1.1.1
$ npm version premajor
v2.0.0-0
$ npm version prepatch
v2.0.1-0
$ npm

参考
​​​图文结合简单易学的 npm 包的发布流程​​