chore(deps): bump node-fetch from 2.6.0 to 2.6.1 (asyncapi#171)

Bumps [node-fetch](https://github.com/bitinn/node-fetch) from 2.6.0 to 2.6.1.
- [Release notes](https://github.com/bitinn/node-fetch/releases)
- [Changelog](https://github.com/node-fetch/node-fetch/blob/master/docs/CHANGELOG.md)
- [Commits](node-fetch/node-fetch@v2.6.0...v2.6.1)

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chore: References resolved wrong when parsing is done inside Promise.…

…all() (asyncapi#168)

chore: Parser failing for browser and tests to prevent it in future (a…

…syncapi#163)

chore: Bump to release candidate and readme improvement (asyncapi#160)

chore(release): 0.33.1 (asyncapi#159)

chore(release): 0.33.1

fix: Revert wrong oauth2 or openIdConnect server sec info validation (a…

…syncapi#158)

feat: Add latest spec schema to properly validate headers (asyncapi#155)

feat: Validate oauth2 or openIdConnect have scopes in server sec (asy…

…ncapi#151)

feat: Add latest asyncapi spec after fix for minProperties (asyncapi#152

)

fix: Same schemas in different objects must not be marked as circular (…

…asyncapi#148)