Update docs for v0.3.2 (903 tests)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Morten Tabor

ROADMAP.md

@@ -118,6 +118,7 @@ These features are deferred and may be added in future versions based on need:
 | 0.2.0 | Complete | Estimation tools: rolling/recursive, ADL, diagnostics, style system, 88% coverage |
 | 0.3.0 | Complete | Structural break tests (Chow, CUSUM, Andrews-Ploberger), Markov-switching, 880 tests (86% coverage), 4 example notebooks |
 | 0.3.1 | Complete | Fix smoothed probability leakage in restricted Markov models, 880 tests |
+| 0.3.2 | Complete | Fix Bai-Perron partial structural change & multicollinearity (PR #4), R cross-validation, 903 tests |
 | 0.4.0 | Planned | Autometrics-inspired model selection, step-indicator saturation |
 | 0.5.0 | Planned | Real data examples, example notebooks, Sphinx docs, PyPI stable release |
 | 0.6.0 | Planned | Advanced models: VAR, cointegration, panel data, bootstrap |