[jstet]

Bumps the version to 0.13.0 for #243, #242, #244 and #245.

• feat(lstsv): map appearance columns-n to display_columns #243 (closes xlsform2lstsv: map appearance columns-n to LimeSurvey display_columns #239): appearance=columns-n (n = 1–8) on select_one / select_multiple becomes LimeSurvey's display_columns; plain columns becomes 2. An explicit column count wins over horizontal. New warning appearance-invalid-columns.
• feat(lstsv)!: write allowprev=Y and showxquestions=N as survey settings by default (#240) #242 (closes xlsform2lstsv: default allowprev=Y and showxquestions=N? #240, behaviour change): allowprev=Y and showxquestions=N are written as survey settings by default; a form's limesurvey_allowprev / limesurvey_showxquestions column wins. --no-setting-defaults (option surveySettingDefaults: false) turns them off. The way back leaves the defaults out, so forms round-trip unchanged.
• fix(lstsv): an optional select_multiple with a lower bound can be left empty (#217) #244 (fixes xlsform2lstsv: min_answers blocks an empty optional select_multiple in LimeSurvey (ODK skips the constraint) #217): on an optional select_multiple, a lower bound from count-selected(.) goes into the guarded em_validation_q (count(…) == 0 or (…)) instead of min_answers, so the question can be left empty as in ODK. A required question keeps min_answers.
• fix(lstsv): emit regex() as regexMatch('/pat/', x) #245 (fixes xlsform2lstsv: regex() is emitted as regexMatch(self, 'pat'), but LimeSurvey expects regexMatch('/pat/', self) #218): regex(x, 'pat') becomes regexMatch('/^(?:pat)$/', x): pattern first, delimited, / escaped, anchored like ODK's whole-value match. The way back reads both this and the old field-first form.

Behaviour change for consumers: every TSV gains allowprev and showxquestions S rows; TSVs with regex() constraints or optional select_multiple lower bounds change. No API changes apart from the new option.

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