Replace npm with yarn

[ameerthehacker]

Description

• Install yarn in your local system
• Remove the package-lock.json
• Run yarn install
• Commit with the file yarn.lock which will be automatically generated
• Update the README by replacing the npm commands with yarn

[nicmeriano]

I can do this!

[ameerthehacker]

Please goahead

[ameerthehacker]

closing this issue as a PR was made and merged