build: update rollup to version 2.23.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
rollup (source)	dependencies	minor	2.22.2 -> 2.23.0
rollup (source)	devDependencies	minor	2.3.4 -> 2.23.0

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Release Notes

rollup/rollup

v2.23.0

Compare Source

2020-07-23

Features

• Handle environments with only globalThis in UMD output (#​3691)

Pull Requests

• #​3691: Check for globalThis in UMD wrapper (@​lukastaegert)

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