add criterion to important packages (#15604)

* add criterion to important packages

* use a special nimscript for criterion tests

* fix criterion speed differently

Co-authored-by: Andreas Rumpf <rumpf_a@web.de>

Author: disruptek

testament/important_packages.nim

@@ -31,6 +31,7 @@ pkg1 "cligen", "nim c --path:. -r cligen.nim"
 pkg1 "combparser", "nimble test --gc:orc"
 pkg1 "compactdict"
 pkg1 "comprehension", "nimble test", "https://github.com/alehander42/comprehension"
+pkg1 "criterion"
 pkg1 "dashing", "nim c tests/functional.nim"
 pkg1 "delaunay"
 pkg1 "docopt"