Merge pull request #56 from chazuttu/pytest_vcr_dummy

pytest-vcr support added

Author: reingart

requirements-dev.txt

@@ -2,3 +2,4 @@ pytest==4.6.11; python_version <= '2.7'
 pytest==6.2.3; python_version > '3'
 pytest-html==1.22.1; python_version <= '2.7'
 pytest-html==3.1.1; python_version > '3'
+pytest-vcr==1.0.2