Update dependency renovate to ^20.0.2

This MR contains the following updates:

Package	Type	Update	Change
renovate (source)	dependencies	patch	^20.0.1 -> ^20.0.2

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

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Release Notes

renovatebot/renovate

v20.0.2

Compare Source

20.0.2 (2020-05-20)

Bug Fixes

• pr: better github.com token warning for self hosted (ab5fe63), closes #​6283

Code Refactoring

• pnpm lockfile updates use util/exec docker (#​6282) (680edf3)

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This MR has been generated by Renovate Bot.