enhance: useCache() and useStatefulResource() respect invalidIfStale

[ntucker]

BREAKING CHANGE: When invalidIfStale is true, useCache() and
useStatefulResource() will no longer return entities, even if they
are in the cache

Motivation

invalidIfStale was added, and its behavior affected suspense, which is the primary mechanism to use data. However, as other use cases expanded it became clear that equivalent behavior should be reflected in the other hooks. This is especially important when not using suspense at all - for instance when useStatefulResource().

Solution

This only changes behavior when invalidIfStale is true.

In this case, we should consider the same case where useResource() would suspend and return 'empty' results. This is key for replicating the same behaviors and patterns with both useCache() and useStatefulResource().

[github-actions]

Size Change: +322 B (1%)

Total Size: 30.3 kB

Filename	Size	Change
packages/legacy/dist/index.cjs.js	433 B	+9 B (2%)
packages/rest-hooks/dist/index.cjs.js	16.7 kB	+227 B (1%)
packages/rest-hooks/dist/index.umd.min.js	7.08 kB	+86 B (1%)

ℹ️ View Unchanged

Filename	Size	Change
packages/legacy/dist/index.umd.min.js	376 B	0 B
packages/normalizr/dist/normalizr.es.min.js	2.17 kB	0 B
packages/test/dist/index.cjs.js	1.84 kB	0 B
packages/use-enhanced-reducer/dist/index.cjs.js	1.08 kB	0 B
packages/use-enhanced-reducer/dist/index.umd.min.js	593 B	0 B

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