Upgrade ItemSearch deprecation warnings to FutureWarning #295
Description
Per @TomAugspurger's comment #284 (review), we should upgrade the deprecation warnings in the old ItemSearch methods to FutureWarnings in a future release.
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Per @TomAugspurger's comment #284 (review), we should upgrade the deprecation warnings in the old ItemSearch methods to FutureWarnings in a future release.