Upgrading to v2

• BREAKING: Require Node.js >=15.10.0 because HTTP2 support on lower Node.js versions is very buggy.
• BREAKING: Bump cheerio to 1.0.0-rc.10 from rc.3. There were breaking changes in cheerio between the versions so this bump might be breaking for you as well.
• Remove LiveViewServer which was deprecated before release of SDK v1.