CRAN submission prep v0.2.7

- Bump version to 0.2.7
- Finalize NEWS for 0.2.7 (loo 2.10.0 compatibility fix)
- Add submission note to cran-comments.md

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: yoshidk6

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: BayesERtools
 Type: Package
 Title: Bayesian Exposure-Response Analysis Tools
-Version: 0.2.6.9000
+Version: 0.2.7
 Authors@R: 
     c(person("Kenta", "Yoshida", , "yoshida.kenta.6@gmail.com", role = c("aut", "cre"),
              comment = c(ORCID = "0000-0003-4967-3831")),

NEWS.md

@@ -1,4 +1,4 @@
-# BayesERtools 0.2.6.9000
+# BayesERtools 0.2.7
 
 ## Bug fixes
 

cran-comments.md

@@ -1,3 +1,10 @@
+## Submission notes
+
+This release fixes the test failure reported on CRAN's r-devel checks, which
+was caused by a change in `loo` 2.10.0: `loo_compare()` now returns a data
+frame with model names in a `model` column instead of a matrix with names in
+the row names. The package now handles both output formats.
+
 ## Test environments
 
 * local Mac OSX install, R 4.4.1