Refactor pipenv usage according to semi-official best practices. Closes #142

.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 = "*"

setup.py

@@ -25,7 +25,7 @@ required = [
     'pytz',
     'dateparser>=0.7.0',
     'tzlocal',
-    'pendulum',
+    'pendulum>=1.0',
     'snaptime'
 ]