Flipper plugin incompatible with Flipper 0.113+

[TheAlmightyBob]

As of Flipper Desktop 0.113.0, the Reactotron Flipper plugin no longer displays events. The Flipper error log is filled with reports like:

Failed to process event for plugin flipper-plugin-reactotron TypeError: Cannot assign to read only property 'important' of object '#<Object>'

I tried upgrading to the latest versions of FlipperKit (0.132.0), react-native-flipper (0.131.0), and reactotron-react-native (5.0.1), but this made no difference.

Tested with both React Native 0.63.4 and 0.66.4.

Flipper Desktop 0.112.0 and lower still work with the Reactotron plugin.