[Snyk] Upgrade react-flow-renderer from 9.1.0 to 9.1.1

Snyk has created this PR to upgrade react-flow-renderer from 9.1.0 to 9.1.1.

merge advice :information_source: Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.

The recommended version is 1 version ahead of your current version.
The recommended version was released 22 days ago, on 2021-03-05.

Release notes

Package name: react-flow-renderer

9.1.1 - 2021-03-05
Features

You can now change the size of the edge updater anchor with the edgeUpdaterRadius prop
- feat(edgeUpdater): add edgeUpdaterRadius prop (d89be58)
Fixes & Refactorings
- fix(edges): unset nodes selection on click closes #966 (6d2221b)
- refactor(edgeAnchor): add types, class name handling (0ca48c2)
- chore(examples): add undirectional (b71c9eb)
9.1.0 - 2021-03-01
Features

We added a new useUpdateNodeInternals hook that gives you the possibility to update the node internals like handles, size, position programatically. Usage:
```
const updateNodeInternals = useUpdateNodeInternals();

// somewhere in your app
updateNodeInternals('node-id');
```
We also added a onEdgeContextMenu prop and it's possible to pass standard html attributes to the EdgeText component now.
- feat(hooks): useUpdateNodeInternals #916 (3613c7c)
- refactor(edge-text): allow html attributes as props (2540039)
- feat(utils): export getTransformForBounds func (1745320)
- feat(edge): add onEdgeContextMenu handler #943 (0d1d802)
Refactorings
- refactor(components): always import HTMLAttributes from react (5a36bf6)
- fix(wrapEdge): use simplified EdgeAnchor component (6ed73fb)
- fix(wrapEdge): use EdgeAnchors components (443b1ce)
- fix(wrapEdge): shift edge updater circles positions to not overlap node handles (2f2ba19)