chore: update pytest syntax (#54)

Update the 'py.test' syntax to use 'pytest' for better cross-platform support.

Author: ciband

.travis.yml

@@ -9,7 +9,7 @@ install:
 before_script:
   - flake8 .
 script:
-  - py.test -v -s --cov=crypto --cov-config=.coveragerc --cov-report xml
+  - pytest -v -s --cov=crypto --cov-config=.coveragerc --cov-report xml
 after_success:
   - bash <(curl -s https://codecov.io/bash)
 branches:

Makefile

@@ -1,5 +1,5 @@
 test:
-	py.test -v -s $(ARGS)
+	pytest -v -s $(ARGS)
 
 lint:
 	flake8 .