add requirements.txt installs to tox

Author: chrissimpkins

.travis.yml

@@ -13,20 +13,17 @@ matrix:
       env: TOX_ENV=py36
       install:
         - pip install tox
-        - pip install -r requirements.txt
       script: tox -e $TOX_ENV
     - python: 3.7
       env: TOX_ENV=py37
       install:
         - pip install tox
-        - pip install -r requirements.txt
       dist: xenial
       script: tox -e $TOX_ENV
     - python: 3.8
       env: TOX_ENV=py38
       install:
         - pip install tox
-        - pip install -r requirements.txt
       dist: xenial
       script: tox -e $TOX_ENV
     - python: 3.7

tox.ini

@@ -1,14 +1,14 @@
 [tox]
-envlist = py27, py36, py37
+envlist = py37
 
 [testenv]
 commands =
     py.test tests
     ;- coverage run --source {{fontline}} -m py.test
     ;- coverage report
 deps =
+    -rrequirements.txt
     pytest
-    fontTools
 
 [testenv:flake8]
 deps =