- Update to version 5.7.0 (13 Sept 2019):
* Minor efficiency improvements to the SQL-backed dictionary.
* Incompatible change to the Exp traversal API.
* Remove the obsolete and unsupported "corpus statistics" code.
* Major performance improvement (3x-4x) for long sentences.
* Fix a bug that causes random results on 32-bit systems.
* Fix a bug that could cause missing linkages on some systems.
- Changes from version 5.6.2 (24 June 2019):
* Bug-fix the SQL-backed dictionary.
* Add missing public symbol to shlib export list.
* English dict: additions of paraphrasing verbs.
- Changes from version 5.6.1 (27 May 2019):
* Performance improvement (approx 20%) in expressions.
* Performance improvement (approx 10%) by disjunct/connectors pools.
* Performance improvement (4-10% for English) by faster power-pruning.
* Fix a bug in trailing connectors encoding (may cause bad linkages).
* Fix inability to form linkage when first word is disconnected.
* English dict: fix use of quotations with paraphrasing verbs.
* English dict: fix broken usage of "have not".
* Performance improvement (approx 16%) for long sentences.
* Performance improvement (approx 20%) for long sentences.
- Changes from version 5.6.0 (4 January 2019):
* Fix dict cost reading under user locales with comma decimal separator.
* Support using the pcre2 regex package (configured by default if available).
* Add "-with-regexlib=pcre2|tre|regex|c" to "configure".
* Revise the manpage.
* Remove the experimental Viterbi code.
* Revise the SAT parser cost model to align it with the classic parser.
* Implement a strict check on connector name.
* Fix linkage_get_disjunct_*() when parse-option display_morphology is true.