Make mixed model test data permanent to ensure reproducibility

To ensure that tests on different platforms work on the same data, the
mixed modelling test data previosly generated in
tests/testthat/setup_script.R were generated once using the script in
inst/dataset/generation/ds_mixed.R, and are now distributed with the
package.

4 files changed, 62 insertions, 58 deletions

diff --git a/tests/testthat/_snaps/multistart/llhist-for-biphasic-saemix-fit.svg b/tests/testthat/_snaps/multistart/llhist-for-dfop-sfo-fit.svg
index 6015aed8..6015aed8 100644
--- a/tests/testthat/_snaps/multistart/llhist-for-biphasic-saemix-fit.svg
+++ b/tests/testthat/_snaps/multistart/llhist-for-dfop-sfo-fit.svg
diff --git a/tests/testthat/_snaps/multistart/llhist-for-sfo-fit.svg b/tests/testthat/_snaps/multistart/llhist-for-sfo-fit.svg
index 98513d06..028c69de 100644
--- a/tests/testthat/_snaps/multistart/llhist-for-sfo-fit.svg
+++ b/tests/testthat/_snaps/multistart/llhist-for-sfo-fit.svg
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diff --git a/tests/testthat/_snaps/multistart/parplot-for-biphasic-saemix-fit.svg b/tests/testthat/_snaps/multistart/parplot-for-dfop-sfo-fit.svg
index 7017908e..7017908e 100644
--- a/tests/testthat/_snaps/multistart/parplot-for-biphasic-saemix-fit.svg
+++ b/tests/testthat/_snaps/multistart/parplot-for-dfop-sfo-fit.svg
diff --git a/tests/testthat/_snaps/multistart/parplot-for-sfo-fit.svg b/tests/testthat/_snaps/multistart/parplot-for-sfo-fit.svg
index 18eb7fcc..a47a585a 100644
--- a/tests/testthat/_snaps/multistart/parplot-for-sfo-fit.svg
+++ b/tests/testthat/_snaps/multistart/parplot-for-sfo-fit.svg
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