Merge pull request #144 from kennethreitz/feature/cleanup-pipenv-use

Refactor pipenv usage according to semi-official best practices.

.travis.yml

@@ -9,7 +9,10 @@ matrix:
         - python: "3.7-dev"
 
 # command to install dependencies
-install: pip install pipenv; pipenv lock; pipenv install --dev
+install:
+    - pip install pipenv
+    - pipenv install '-e .' --skip-lock --ignore-pipfile
+    - pipenv install --dev --skip-lock
 
 # command to run tests
 script: pipenv run pytest tests/

Pipfile

@@ -2,11 +2,3 @@
 freezegun = "*"
 pytest = "*"
 sphinx = "*"
-
-[packages]
-humanize = "*"
-pytz = "*"
-dateparser = ">=0.7.0"
-tzlocal = "*"
-pendulum = ">=1.0"
-snaptime = "*"