Can't install cordova-plugin-googlemaps-sdk with npm or yarn

[Vitaly Pankov]

Tried to run
ionic cordova plugin add cordova-plugin-googlemaps
it was stuck on message
Installing "cordova-plugin-googlemaps" for ios

--verbose flag showed that it trying to run
npm install https://github.com/mapsplugin/cordova-plugin-googlemaps-sdk --production --save

then I tried to run
npm install https://github.com/mapsplugin/cordova-plugin-googlemaps-sdk
but it stuck with message rollbackFailedOptional

then I tried to run it in empty folder with inited yarn
yarn add https://github.com/mapsplugin/cordova-plugin-googlemaps-sdk
it stuck on [1/4] Resolving packages...

npm 6.14.8
git 2.9.2
yarn 1.17.3
MacOS
Tried different internet connections and devices

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[Masashi Katsumata]

I really appreciate if you search the past issues before asking.
#320

[Vitaly Pankov]

Thank you. Yarn finished in 30 minutes, npm still trying to install it, hope it will done.
Anyway your answer will solve it fo me.