Update dependency renovate to ^20.1.0

This MR contains the following updates:

Package	Type	Update	Change
renovate (source)	dependencies	minor	^20.0.2 -> ^20.1.0

MR created with the help of gitlab-org/frontend/renovate-gitlab-bot

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Release Notes

renovatebot/renovate

v20.1.0

Compare Source

Features

• bundler: use renovate cache (#​6289) (1c2f4fd)

v20.0.3

Compare Source

20.0.3 (2020-05-20)

Bug Fixes

• composer: Handle minimum-stability version constraints (#​6268) (6218751)

Code Refactoring

• revert yarnv2 logic (0853fd4)

Miscellaneous Chores

• remove unused yarnIntegrity and mutex (dad4e12)
• support for nodejs >=12 (#​6288) (797fce1)

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This MR has been generated by Renovate Bot.