build: update rollup to version 2.2.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
rollup (source)	dependencies	minor	2.1.0 -> 2.2.0

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Release Notes

rollup/rollup

v2.2.0

Compare Source

2020-03-24

Features

• Add renderDynamicImport hook to rewrite dynamic import expressions (#​3449)
• Add information about dynamically imported modules to this.getModuleInfo (#​3449)

Bug Fixes

• Make file emission work with Uin8Array sources when using Rollup in the browser (#​3452)
• Fix types to allow watch to accept an array of configs (#​3453)
• Do not strip .js extensions from AMD imports when the import is a user-supplied replacement for a non-resolvable dynamic import target (#​3453)

Pull Requests

• #​3449: Avoid the assumption of Buffer in browser envs (@​lukastaegert)
• #​3452: Avoid the assumption of Buffer in browser envs (@​JoviDeCroock)
• #​3453: fix types since watch accepts single or array config (@​lukeed)
• #​3456: fix SystemJS url in tutorial (@​guybedford)

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