equal Hard Erroring on Proxies

I discovered this from [Apollo Client](https://github.com/apollographql/apollo-client).

In some cases, the parameters passed to the `equal` method are wrapped in Proxies. If the wrapped value is an object with a nested array, it hard errors on [this specific line](https://github.com/benjamn/wryware/blob/main/packages/equality/src/equality.ts#L188) with the following error:

`TypeError: 'get' on proxy: property 'nestedArrayPropertyName' is a read-only and non-configurable data property on the proxy target but the proxy did not return its actual value (expected '[object Array]' but got '[object Array]')`

Start at packages/equality/src/equality.ts around line 188 and reproduce the failure with a Proxy-wrapped object containing a nested array, using the Apollo Client report as context. The work is done when equal no longer hard-errors on this case and the behavior is covered by regression coverage.

Written by the indexing model from the issue text.