D-Tale 2.9.1

Highlights include:

• #709: added additional VSCode check for VSCODE_INJECTION
• #714: pushed plotly legend below x-axis labels
• #711: fix for predefined filters to return numbers to the backend when necessary
• frontend package upgrades:
  • upgraded to latest version of react
  • dropped enzyme in favor of @testing-library/react
  • upgraded chart.js