oniguruma

• add doc/SYNTAX.md into distribution file

• Fix Issue #139

• Update Unicode version 12.1.0 (draft)

• NEW: Unicode Text Segment mode option (?y{g}) (?y{w})

  g: Extended Grapheme Cluster mode / w: Word mode

• Speed improvement (* especially UTF-8)

• Update Unicode version 11.0.0
• NEW: add Emoji properties

• Fix: #80 UChar in header causes issue
• NEW API: onig_set_callout_user_data_of_match_param() (* omission in 6.8.0)
• add doc/CALLOUTS.API and doc/CALLOUTS.API.ja

• Update shared library version to 5.0.0 for API incompatible changes from 6.7.1

• Retry-limit-in-match function enabled by default
• NEW: configure option --enable-posix-api=no (* enabled by default)
• NEW API: onig_search_with_param(), onig_match_with_param()
• NEW: Callouts of contents (?{...contents...}) (?{...}[X<>]) (?{{....}})
• NEW: Callouts of name (*name) (*name[tag]{args...})
• NEW: Builtin callouts (*FAIL) (*MISMATCH) (*ERROR{n}) (*COUNT) (*MAX{n}) etc..

(* Callout function API is experimental level and isn't fixed definitely yet. Undocumented now)

• NEW: Mechanism of try-in-match-limit (* disabled by default)
• #73: Update for automake 1.15.1

• NEW: hexadecimal codepoint \uHHHH
• NEW: add ONIG_SYNTAX_ONIGURUMA (== ONIG_SYNTAX_DEFAULT)
• Disabled \N and \O on ONIG_SYNTAX_RUBY
• Reduced object size

• Fix definition of \X

• NEW: ASCII only mode options for character type/property (?WDSP)
• NEW: Extended Grapheme Cluster boundary \y, \Y (*original)
• NEW: Extended Grapheme Cluster \X
• Range-clear (Absent-clear) operator restores previous range in backtrack.

• NEW: \K (keep)
• NEW: \R (general newline) \N (no newline)
• NEW: \O (true anychar)
• NEW: if-then-else syntax (?(...)...|...)
• NEW: Backreference validity checker (*original)
• NEW: Absent repeater (?~absent)
• NEW: Absent expression (?~|absent|expr) (*original)
• NEW: Absent range cutter (?~|absent) (*original)

• Fix fatal problem of endless repeat on Windows
• NEW: call zero (call the total regexp)
• NEW: relative backref and relative call by positive number

NEW SYNTAX: escape-o-brace for octal codepoint.
Fix many bugs: #55 - #60

Fix many bugs. (#52 etc..)

NEW API: onig_set_capture_num_limit() (#46)

Fix Issue #35

Fix Issue #35

• allow word bound, word begin and word end in look-behind.
• NEW option: ONIG_OPTION_CHECK_VALIDITY_OF_STRING

• Fix fatal bug Issue #23