Update dependency renovate to v21

This MR contains the following updates:

Package	Type	Update	Change
renovate (source)	dependencies	major	^20.25.8 -> ^21.0.1

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

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Release Notes

renovatebot/renovate

v21.0.1

Compare Source

21.0.1 (2020-06-05)

Bug Fixes

• ensure trailing slash for datasource baseUrls (381d010)

v21.0.0

Compare Source

⚠ BREAKING CHANGES

• npm: If installing renovate from npm, and also using lerna, then you now must install lerna prior to running renovate.

Features

• npm: call lerna directly instead of via npx (#​6434) (07d3afc)

Bug Fixes

• nuget: handle missing properties (#​6437) (3166e2b)

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This MR has been generated by Renovate Bot.