Update dependency rollup to v2.7.2

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
rollup (source)	devDependencies	patch	2.7.1 -> 2.7.2

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Release Notes

rollup/rollup

v2.7.2

Compare Source

2020-04-22

Bug Fixes

• Prevent an infinite loop when creating separate manual chunks with circular dependencies (#​3510)
• Do not fail if "super" is used in the definition of a class field (#​3511)
• Throw if a plugin tries to emit a file with an absolute Windows path (#​3509)

Pull Requests

• #​3509: Ban emitFile via absolute paths on Windows OS (@​SASUKE40)
• #​3510: Do not fail for circular imports between manual chunks (@​lukastaegert)
• #​3511: Support "super" in class fields (@​lukastaegert)

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