ci: add benchmark of RunModel

Refs #136

.gitlab-ci.yml

@@ -23,7 +23,7 @@ default:
   stage: check
   script:
   - R -e 'rcmdcheck::rcmdcheck(args = ifelse(as.logical(Sys.getenv("NOT_CRAN")), "", "--as-cran"), error_on = "warning")'
-  - R -e 'install.packages("airGR", repos = "http://cran.r-project.org")'
+  - R -e 'install.packages(c("microbenchmark", "airGR"), repos = "http://cran.r-project.org")'
   - Rscript tests/scheduled_tests/benchmarkRunModel.R
   - R CMD INSTALL .
   - Rscript tests/scheduled_tests/benchmarkRunModel.R