Don't swallow exception when dropping table
Remove support for implicit cross joins

The pre-ANSI join syntax makes it very easy to accidentally perform a
cross join when an inner join was intended, not to mention resulting in
harder to read queries, so we need a way to disable it via configuration.
Add 0.56 release notes
Add note about SPI change
Add note about constant join criteria
Guarantee that semaphore is always released
Fix future exception check
[maven-release-plugin] prepare release 0.56
[maven-release-plugin] prepare for next development iteration
Add Presto logo files
Change HashAggregationOperator to support multi channel group by
Isolate aggregates in separate classloader
Change join operator to support multi channel hash
Remove unused packIfNecessary from visitSemiJoin
Change sort, topN and window operators to support multiple channels

Remove single channel packing from LocalExecutionPlanner
Change variance intermediates to use hand built slice instead of a multi channel tuple
Change TupleInfo to support only a single value
Remove unused DirectFieldOrderedTupleComparator
Remove getTypes, getFieldCount, and getFieldOffset from TupleInfo
Remove unused UncompressedBlockCursor