Skip ch 11, r 2 on Circle CI [skip appveyor]

Author: robertodr

.circleci/config.yml

@@ -47,7 +47,7 @@ variables:
         pipenv run python testing/collect_tests.py 'chapter-08/recipe-*' &&
         pipenv run python testing/collect_tests.py 'chapter-09/recipe-*' &&
         pipenv run python testing/collect_tests.py 'chapter-10/recipe-*' &&
-        pipenv run python testing/collect_tests.py 'chapter-11/recipe-0[1-3]' &&
+        pipenv run python testing/collect_tests.py 'chapter-11/recipe-0[1,3]' &&
         pipenv run python testing/collect_tests.py 'chapter-12/recipe-*' &&
         pipenv run python testing/collect_tests.py 'chapter-13/recipe-*' &&
         pipenv run python testing/collect_tests.py 'chapter-14/recipe-*'