Build tweaks

Author: russss

.travis.yml

@@ -5,7 +5,7 @@ python:
 - '3.6'
 - '3.7'
 install:
-- pip install pytest unittest2
+- pip install -r ./dev-requirements.txt
 - python ./setup.py develop
 script:
 - python3 -m pytest
@@ -22,7 +22,7 @@ jobs:
   include:
   - stage: lint
     python: 3.7
-    install: pip install black flake8
+    install: pip install -r ./dev-requirements.txt
     script:
     - black --check ./emv
     - flake8 ./emv

dev-requirements.txt

@@ -0,0 +1,4 @@
+flake8==3.8.4
+black==20.8b1
+pytest==6.1.2
+unittest2==1.1.0

setup.py

@@ -30,12 +30,12 @@
     python_requires=">=3.4",
     packages=["emv", "emv.protocol", "emv.command"],
     install_requires=[
-        "enum-compat",
-        "argparse",
-        "pyscard",
-        "pycountry",
-        "terminaltables",
-        "click",
+        "enum-compat==0.0.3",
+        "argparse==1.4.0",
+        "pyscard==2.0.0",
+        "pycountry==20.7.3",
+        "terminaltables==3.1.0",
+        "click==7.1.2",
     ],
     entry_points={"console_scripts": {"emvtool=emv.command.client:run"}},
 )