refactor: Expose `CacheMissing::inner` field (#41) #76

Job	Run time
run-headless-tests (ubuntu-latest, firefox)	22s
run-checks (stable)	2m 39s
run-headless-tests (ubuntu-latest, chrome)	16s
run-cargo-tests (stable)	55s
run-checks (nightly)	1m 44s
run-cargo-tests (nightly)	1m 49s
run-checks (1.75)	40s
	8m 25s

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