chore(build): Update and hoist rollup-plugin-typescript2

[lobsterkatie]

As part of prepping for the new bundling process, this updates rollup-plugin-typescript2 to latest and hoists it into the main package.json.

This update has two effects on the eventual bundles, neither of which affects SDK code.

Updated licensing text:

Slightly different tslib implementations:

[github-actions]

size-limit report

Path	Base Size (c8b3691)	Current Size	Change
@sentry/browser - ES5 CDN Bundle (gzipped + minified)	19.69 KB	19.77 KB	+0.42% 🔺
@sentry/browser - ES5 CDN Bundle (minified)	62.91 KB	63.18 KB	+0.43% 🔺
@sentry/browser - ES6 CDN Bundle (gzipped + minified)	18.51 KB	18.51 KB	+0.01% 🔺
@sentry/browser - ES6 CDN Bundle (minified)	56.8 KB	56.8 KB	+0.01% 🔺
@sentry/browser - Webpack (gzipped + minified)	22.21 KB	22.21 KB	0%
@sentry/browser - Webpack (minified)	76.02 KB	76.02 KB	0%
@sentry/react - Webpack (gzipped + minified)	22.24 KB	22.24 KB	0%
@sentry/nextjs Client - Webpack (gzipped + minified)	46.31 KB	46.31 KB	0%
@sentry/browser + @sentry/tracing - ES5 CDN Bundle (gzipped + minified)	28.22 KB	28.33 KB	+0.36% 🔺

[lobsterkatie]

One thing of interest: this makes the ES5 bundles larger, but doesn't change the size of the ES6 bundles. Given what changes it makes perfect sense, it's just a nice illustration of the advantages of using ES6 over ES5.