added coverage target

Author: markvanderloo

Makefile

@@ -28,6 +28,9 @@ revdep: pkg
 mv *.tar.gz revdep
 R -s -e "out <- tools::check_packages_in_dir('revdep',reverse=list(which='most'),Ncpus=3); print(summary(out)); saveRDS(out, file='revdep/output.RDS')"
 
+covr: 
+R -e 'covr::package_coverage("./pkg")'
+
 clean:
 rm -rf stringdist.Rcheck
 rm -rf revdep