Drop PyPy and Python < 3.5

.travis.yml

@@ -1,11 +1,9 @@
 language: python
+dist: xenial
 python:
-  - 2.7
-  - 3.4
   - 3.5
   - 3.6
-  - 3.7-dev
-  - pypy
+  - 3.7
 install:
   - pip install codecov
   - pip install -r requires/installation.txt
@@ -17,7 +15,7 @@ deploy:
   distributions: sdist bdist_wheel
   provider: pypi
   on:
-    python: 2.7
+    python: 3.7
     tags: true
     all_branches: true
   user: sprockets

setup.py

@@ -43,18 +43,11 @@ setuptools.setup(
         'License :: OSI Approved :: BSD License',
         'Natural Language :: English',
         'Operating System :: OS Independent',
-        'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.6',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.2',
-        'Programming Language :: Python :: 3.3',
-        'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: Implementation :: CPython',
-        'Programming Language :: Python :: Implementation :: PyPy',
         'Topic :: Software Development :: Libraries',
         'Topic :: Software Development :: Libraries :: Python Modules'
     ],
@@ -63,4 +56,5 @@ setuptools.setup(
     tests_require=tests_require,
     namespace_packages=['sprockets', 'sprockets.mixins'],
     test_suite='nose.collector',
+    python_requires='>=3.5',
     zip_safe=False)

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py34,py35,pypy
+envlist = py35,py36,py37
 indexserver =
 	default = https://pypi.python.org/simple
 toxworkdir = build/tox