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Merge pull request ans-group#58 from superbiche/fix/env-check-nullabl…

…e-values

fix(check): env check false positive when value is defined but null

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Merge pull request ans-group#55 from awarrenlove/degraded-status

Support DEGRADED status in HealthChecks

Merge pull request ans-group#51 from nick322/patch-1

(ans-group#50) Backward compatibility Laravel Cache

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