Plugin update won't work with locally developed plugin

Hello,

Description

I created a tns app with tns create MyTnsApp --tsc and a plugin (with nativescript-plugin-seed) for it and put it to the plugins folder.

Here is the directory tree:

├── app
│   ├── package.json
│   └── <other files>
├── hooks
│   └── < ... >
├── node_modules
│   └── < ... >
├── package.json
├── platforms
│   └── < ... >
└── plugins
    └── nativescript-myplugin
        └── src
            ├── package.json
            └── < ... >

I can successfully add the plugin via: tns plugin add plugins/nativescript-myplugin/src/

I can successfully remove the plugin via: tns plugin remove nativescript-myplugin

The problem

Using tns plugin update nativescript-myplugin removes the plugin I want but it tries to get the source from https://registry.npmjs.org/nativescript-myplugin which drops a 404 error, of course.
So, the install fails.

Using tns plugin update plugins/nativescript-myplugin/src/ says "Plugin "plugins/nativescript-myplugin/src/" is not installed."

The expectation

I would like to update my plugin even if I develop it locally.
Either giving the path of the plugin or the name of it,update should work without a problem.

先使用 tns plugin add plugins/nativescript-myplugin/src/ 重現此行為，然後執行 tns plugin update nativescript-myplugin 和以路徑為基礎的更新命令。追蹤 tns plugin update 的 CLI 進入點，並比較已安裝的本機外掛程式如何被記錄與解析。完成的標準是：無需取得無法使用的 npm 套件，即可依名稱或路徑更新本機外掛程式。