Can't push to arrays in `reactotron-core-client`

Nobody has claimed this yet.

Error when using the latest beta release and upgrading React Native.

### Steps to reproduce the issue.
1. Checkout to https://github.com/infinitered/ignite/pull/2377
2. Checkout to https://github.com/infinitered/reactotron/pull/1288
3. Update this metro config in `ignite/boilerplate/metro.config.js`
5. Run `npx zx scripts/install-workspace-packages-in-target.mjs ~/Code/ignite/boilerplate/` from reactotron repo
6. Run `yarn start` and `yarn ios` in ignite/boilerplate repo

### Context
Tried getting around this by updating the property

But this caused another issue where non-core plugins weren't getting initialized correctly like in reactotron-mst.

Seems like that mutating class properties causes some funky business with prototypes: https://stackoverflow.com/questions/57037585/why-we-cannot-add-a-new-property-to-an-object-constructor-the-same-way-we-add-a

Start by reproducing the failure using the referenced Ignite and Reactotron pull requests, the change in ignite/boilerplate/metro.config.js, the workspace-package install command, and yarn start/yarn ios. Investigate the array behavior in reactotron-core-client alongside the reported prototype issue. Done means arrays can be pushed after the upgrade and non-core plugins such as reactotron-mst still initialize correctly.

Written by the indexing model from the issue text.