Can't install plugin due to missing package.json

[PuntjeKetting]

When trying to install this plugin, using cordova 8.x, I get the following error:

Mac:~ frinky$ cordova plugin add https://bitbucket.org/codeyellow/cordova-plugin-signature-view.git
Failed to fetch plugin https://bitbucket.org/codeyellow/cordova-plugin-signature-view.git via registry.
Probably this is either a connection problem, or plugin spec is incorrect.
Check your connection and plugin name/version/URL.
Error: npm: Command failed with exit code 1 Error output:
npm ERR! code ENOPACKAGEJSON
npm ERR! package.json Non-registry package missing package.json: git+https://bitbucket.org/codeyellow/cordova-plugin-signature-view.git.
npm ERR! package.json npm can't find a package.json file in your current directory.

Could you add a package.json to this plugin?