Python 3.7 support + upgrade cchardet

.travis.yml

@@ -4,12 +4,16 @@ sudo:
 language:
   python
 
-python:
-  - 2.7
-#  - 3.4  # FIXME: There's a bug on setuptools on 3.4 that breaks our tests
-#  (see https://github.com/pypa/setuptools/issues/951)
-  - 3.5
-  - 3.6
+matrix:
+  include:
+    - python: 2.7
+    # - python: 3.4  # FIXME: There's a bug on setuptools on 3.4 that breaks our tests
+    #  (see https://github.com/pypa/setuptools/issues/951)
+    - python: 3.5
+    - python: 3.6
+    - python: 3.7
+      dist: xenial
+      sudo: required
 
 env:
   global:

setup.py

@@ -24,7 +24,7 @@ def read(*paths):
     'six>=1.10,<2.0',
     'click>=6.7,<8.0',
     'requests>=2.8,<3.0',
-    'cchardet>=1.0,<2.0',
+    'cchardet>=1.0,<3.0',
     'jsonschema>=2.5,<3.0',
     'unicodecsv>=0.14,<2.0',
     'jsonpointer>=1.10,<2.0',
@@ -80,5 +80,6 @@ def read(*paths):
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
     ],
 )

tests/test_infer.py

@@ -28,4 +28,4 @@ def test_infer():
 
 def test_infer_non_utf8_file():
     descriptor = infer('data/data_with_accents.csv')
-    assert descriptor['resources'][0]['encoding'] == 'windows-1252'
+    assert descriptor['resources'][0]['encoding'] == 'iso-8859-1'

tox.ini

@@ -6,6 +6,7 @@ envlist=
   py34
   py35
   py36
+  py37
 
 [testenv]
 deps=