- Previously `resultEqualityCheck` would be called with empty objects as arguments due to how `inputStabilityCheck` works. This update Fixes `resultEqualityCheck` in `weakMapMemoize` so that when input selectors are stable it does not get called on the first run of the output selector.

  - Added runtime unit tests to verify that:
    - `resultEqualityCheck` works correctly when set to `shallowEqual`.
    - `resultEqualityCheck` is not called on the first output selector call.
    - `weakMapMemoize` with `resultEqualityCheck` set to `referenceEqualityCheck` works the same as `weakMapMemoize` without `resultEqualityCheck`.

  - Added runtime unit tests to verify that:
    - `resultEqualityCheck` works correctly when set to `shallowEqual`.
    - `resultEqualityCheck` is not called on the first output selector call.
    - `lruMemoize` with `resultEqualityCheck` set to `referenceEqualityCheck` works the same as `lruMemoize` without `resultEqualityCheck`.

…-weakMapMemoize-resultEqualityCheck