removed package-lock.json to avoid dep conflict

[AmirAsghary]

• What kind of change does this PR introduce? Bugfix

Including both package-lock.json and yarn.lock is known to cause dependency consistency issues. I'm in favor of using yarn over npm. I removed the package-lock.json file in this PR.

Ref: https://classic.yarnpkg.com/blog/2018/06/04/yarn-import-package-lock/

[AmirAsghary]

Yarn tends to be more performant and causes fewer headaches overall, that's why I prefer yarn.

Npm, when compared with yarn, has more users. Maybe keeping npm and removing yarn make the repo more accessible to contributors.

[phodal]

thanks