ci: fix recent test failure (#461)

* ci: fix recent test failure

* ci: see if all jobs fail

* Update dev-requirements.txt

* Update tests.yml

Author: henryiii

.github/workflows/tests.yml

@@ -47,6 +47,7 @@ jobs:
   cmake:
     runs-on: ubuntu-latest
     strategy:
+      fail-fast: false
       matrix:
         python-version: ["2.7", "3.5", "3.8"] # Waiting on CPython or pybind11 fix: , "3.9-dev"]
 

dev-requirements.txt

@@ -1,5 +1,5 @@
 numpy
-pytest
+pytest <6.1
 pytest-benchmark
 setuptools >=42
 setuptools_scm[toml] >=3.4,!=4.0.0