fix vignette issues

vignettes/simulate_residuals.Rmd

@@ -14,9 +14,29 @@ editor_options:
   chunk_output_type: console
 ---
 
-```{r}
-devtools::load_all()
-library(DHARMa)
+```{r , include=FALSE}
+library(knitr)
+library(performance)
+options(knitr.kable.NA = "")
+knitr::opts_chunk$set(
+  comment = ">",
+  message = FALSE,
+  warning = FALSE,
+  out.width = "100%",
+  dpi = 450
+)
+options(digits = 2)
+
+pkgs <- c("DHARMa", "glmmTMB")
+successfully_loaded <- vapply(pkgs, requireNamespace, FUN.VALUE = logical(1L), quietly = TRUE)
+can_evaluate <- all(successfully_loaded)
+
+if (can_evaluate) {
+  knitr::opts_chunk$set(eval = TRUE)
+  vapply(pkgs, require, FUN.VALUE = logical(1L), quietly = TRUE, character.only = TRUE)
+} else {
+  knitr::opts_chunk$set(eval = FALSE)
+}
 ```
 
 The basic workflow for simulated residual checks using `simulate_residuals()` is as follows.
@@ -45,6 +65,7 @@ simulated_residuals
 Note that since this inherits the DHARMa class, all the methods implemented in DHARMa just work, including all the tests:
 
 ```{r}
+library(DHARMa)
 residuals(simulated_residuals)
 
 DHARMa::testUniformity(simulated_residuals, plot = FALSE)