crystal-lang/crystal-db v0.11.0 has been released and all main drivers are up to date 
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will/crystal-pg v0.26.0
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crystal-lang/crystal-mysql v0.14.0
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crystal-lang/crystal-sqlite3 v0.19.0
The highlights of this release cycle are:
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Better runtime errors when column does not match the expected type. (#156, thanks @jwoertink)
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Close connection resource when connection is lost. (#155, thanks @stakach)
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Discard closed connections in the pool when they are returned. (#154, thanks @stakach)
Don’t miss also will/crystal-pg CHANGELOG for v0.25.0 since some other improvements have landed there.