Allow passing a block to instantiate
Only validate changed associated documents. (regression)

[ fix #2703 ]
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Update changelog to reflect #2683 pullback
Update changelog to reflect #2671 pullback
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Ensure that .sort method change criteria

.sort method was not changing the criteria, so when .first applied it assumed there was no sort and it was ignoring it
making apply_sorting a block function to unsure it will reset the query after execution of .first or .last
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Revert #2703
Update CHANGELOG.md

"Resolved Issues" title moved on top of resolved issues list in 3.0.18 changelog
Support int keys when using dot notation on read.

[ fix #2740 ]
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Integer deserialization properly casts to integers.

[ fix #2739 ]