Release v0.21.4
Merge pull request #662 from plotly/dev Update dependencies based on advisories Former-commit-id: 8a2cfc54548cf729f95a5d0242c058b45dbf4205
Merge pull request #662 from plotly/dev Update dependencies based on advisories Former-commit-id: 8a2cfc54548cf729f95a5d0242c058b45dbf4205