This version does not need to update a revision to activate a new feature.
Changes
* Implement the Block Production Time Limit function to support setting a maximum execution time for a transaction to be added in a block (418, 427)
* Add a new exception in DictDB iteration (420)
* Fix a minor bug in the Fee system (429)
* Optimize the ArrayDB, DictDB and VarDB in SCORE (419, 424)
* Support the sha_256 function in SCORE (422)