docs: add missing v1.3.0 changelog entries for #100, #166, #187, #188, #191, #110/#112

Milestone audit against docs/release_log.rst found six merged, user-facing
changes with no corresponding entry: the prefix-join boundary fix (#179,
closes #100), the is_rootname() stale-cache fix (#166), extra_nickname_delimiters
(#190, closes #110/#112), international honorifics (#187), German nobility
titles (#188, closes #101), and German/Dutch prefixes plus degree suffixes
(#191, closes #18).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Author: derek73

docs/release_log.rst

@@ -9,11 +9,13 @@ Release Log
 
     - Fix suffix-shaped parenthesized/quoted content (e.g. ``"(Ret)"``, ``"(MBA)"``) being misclassified as a nickname instead of a suffix (closes #111)
     - Add ``suffix_acronyms_ambiguous`` to ``Constants`` for acronym suffixes that also read as given-name nicknames (e.g. ``"JD"``, ``"Ed"``), used when disambiguating parenthesized/quoted content (#111)
+    - Add ``extra_nickname_delimiters`` to ``Constants`` for registering additional nickname-delimiter regex patterns at runtime, without subclassing (closes #110, #112)
     - Fix missing comma between ``'msc'`` and ``'mscmsm'`` in ``suffix_acronyms``, which silently concatenated them into a bogus ``'mscmscmsm'`` entry (#111)
     - Add ``given_names`` (and ``given_names_list``) attribute as aggregate of first and middle names, mirroring ``surnames`` (closes #157)
     - Add ``suffix_delimiter`` to ``Constants`` and ``HumanName`` for parsing suffixes separated by arbitrary delimiters, e.g. ``"RN - CRNA"`` (#156)
     - Add ``initials_separator`` to ``Constants`` and ``HumanName`` to control spacing between consecutive initials within a name group (#171)
     - Fix ``Constants`` customizations, singleton identity, and ``TupleManager`` subclass being lost across ``pickle``/``deepcopy`` round-trips (#167, #168, #169)
+    - Fix ``is_rootname()`` returning stale results after ``add()``/``remove()`` on ``titles``, ``prefixes``, ``suffix_acronyms``, or ``suffix_not_acronyms`` (#166)
     - Fix capitalization of suffix acronyms written with dots, e.g. ``"M.D."`` (closes #141)
     - Fix recognition of single-letter roman numeral suffixes (e.g. ``"I"``, ``"V"``) in suffix-comma format (closes #136)
     - Fix recognition of trailing ``suffix_not_acronyms`` (e.g. ``"Jr."``) in lastname-comma format (closes #144)
@@ -22,6 +24,7 @@ Release Log
     - Fix extra whitespace before punctuation in ``str()`` output when a ``string_format`` field is empty (closes #139)
     - Fix ``'apn aprn'`` split into separate ``suffix_acronyms`` entries so each is recognized independently (closes #155)
     - Add ``last_base``, ``last_prefixes`` (and ``_list`` variants) plus ``family`` / ``family_prefixes`` aliases for splitting last-name prefix particles (tussenvoegsels) from the core surname (#130, #132)
+    - Fix suffix boundary lookup for prefixed last names with a title before and after (e.g. ``"dr Vincent van Gogh dr"`` producing a corrupted middle name) (closes #100)
     - Add ``patronymic_name_order`` flag to ``Constants`` and ``HumanName`` for opt-in detection and reordering of Russian formal-order names (Surname GivenName Patronymic) (#85)
     - Add Turkic (Azerbaijani/Central-Asian) patronymic detection to ``patronymic_name_order``, rotating the reversed 4-token formal shape (``Surname GivenName PatronymicRoot Marker``, e.g. ``oglu``/``qizi``) into Western order (#185)
     - Add ``first_name_prefixes`` set to ``Constants``; bound Arabic given-name
@@ -32,6 +35,9 @@ Release Log
       output for names with these prefixes.** (#150)
     - Add ``middle_name_as_last`` flag to ``Constants`` and ``HumanName`` for opt-in folding of middle names into the last name, for naming systems with no middle-name concept (e.g. Arabic patronymic chaining) (#133)
     - Treat an unrecognized, multi-letter token ending in a period in the leading title run (before the first name is set), e.g. ``"Major."``, as a ``title`` instead of a ``first`` name; internal-period abbreviations (``"E.T."``) and single-letter initials (``"J."``) are unaffected. **Default-on: changes parsing of names with a leading unknown period-abbreviation** (closes #109)
+    - Add international honorifics to ``TITLES`` (#187)
+    - Add German/Austrian nobility and ecclesiastical titles to ``TITLES`` (closes #101)
+    - Add German/Dutch last-name prefixes and title/degree suffixes; fix ``join_on_conjunctions()`` to register multi-word prefix chains (e.g. ``"von und zu"``) as prefixes, mirroring existing title handling (closes #18)
 * 1.2.1 - June 19, 2026
     - Fix ``initials()`` interpolating the literal ``None`` for empty name parts when ``empty_attribute_default = None`` (e.g. ``"J. None D."``); empty parts now render as an empty string and a fully-empty result returns ``empty_attribute_default``
     - Add ``python -m nameparser "Name String"`` command-line helper that prints a parsed name