Fix pre-commit failures: update hooks, deps, and style

- Updated `.pre-commit-config.yaml` to use latest hook versions.
- Added `cyclocomp` to `Suggests` in `DESCRIPTION` to resolve linter dependency issues.
- Fixed `lintr` issues in `tests/testthat/helper-functions.R` (explicit returns, object shadowing).
- Fixed `lintr` issues in `tests/testthat/test-family.R` (line lengths, false positive path check).
- Applied formatting fixes (styler, whitespace) to multiple files.

Author: google-labs-jules[bot]

.lintr

@@ -8,8 +8,7 @@ linters: all_linters(
     object_usage_linter = NULL,
     namespace_linter = NULL,
     missing_package_linter = NULL,
-    return_linter(return_style = "explicit"),
-    cyclocomp_linter = NULL
+    return_linter(return_style = "explicit")
   )
 exclusions: list(
     "inst",

DESCRIPTION

@@ -51,6 +51,7 @@ Suggests:
     bayesplot,
     BH (>= 1.66.0),
     bookdown,
+    cyclocomp,
     cmdstanr,
     collapse,
     ggplot2,

tests/testthat/test-family.R

@@ -38,7 +38,7 @@ test_that(
     expect_identical(family_gamma$param, "shape, shape ./ mu") # nolint
     family_weibull <- epidist_family(prep_obs, family = "Weibull")
     expect_identical(
-      family_weibull$param, "shape, mu ./ tgamma(1 + 1 ./ shape)"
+      family_weibull$param, "shape, mu ./ tgamma(1 + 1 ./ shape)" # nolint: nonportable_path_linter.
     )
   }
 )