updates to supported python versions, fix testing import error (#26)

* updates for test imports, python target versions, test config

* fix isort deprecation warning

.travis.yml

@@ -1,8 +1,9 @@
 language: python
 python:
-  - "3.4"
-  - "3.5"
   - "3.6"
+  - "3.7"
+  - "3.8"
+  - "3.9"
 
 # Enable 3.7 without globally enabling sudo and dist: xenial for other build jobs
 matrix:

setup.py

@@ -3,7 +3,7 @@
 """Setup for the pylint-quotes package."""
 
 import os
-from setuptools import setup, find_packages
+from setuptools import setup
 
 here = os.path.abspath(os.path.dirname(__file__))
 
@@ -21,9 +21,9 @@
     author_email=about['__author_email__'],
     url=about['__url__'],
     install_requires=[
-        'pylint>=1.7.6',
+        'pylint>=2.8.0',
     ],
-    python_requires=">=3.4",
+    python_requires=">=3.6",
     packages=['pylint_quotes'],
     zip_safe=False,
     classifiers=(
@@ -32,12 +32,10 @@
         'License :: OSI Approved :: MIT License',
         'Programming Language :: Python',
         'Programming Language :: Python :: 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',
+        'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
         'Topic :: Software Development',
         'Topic :: Utilities'
     ),

tests/test_smart_quotes.py

@@ -7,10 +7,7 @@
 from pylint_quotes.checker import StringQuoteChecker
 from pylint.testutils import Message, set_config
 
-try:
-    from pylint.testutils import tokenize_str
-except ImportError:
-    from pylint.testutils import _tokenize_str as tokenize_str
+from pylint.testutils import _tokenize_str as tokenize_str
 
 from utils import Q_DOUB, Q_SING, TRI_Q_SING, TRI_Q_DOUB, StringQuoteCheckerTestCase
 

tests/test_string_literal.py

@@ -4,10 +4,7 @@
 from pylint_quotes.checker import StringQuoteChecker
 from pylint.testutils import Message, set_config
 
-try:
-    from pylint.testutils import tokenize_str
-except ImportError:
-    from pylint.testutils import _tokenize_str as tokenize_str
+from pylint.testutils import _tokenize_str as tokenize_str
 
 from utils import Q_DOUB, Q_SING, TRI_Q_SING, TRI_Q_DOUB, StringQuoteCheckerTestCase
 

tests/utils.py

@@ -3,10 +3,7 @@
 
 from pylint.testutils import CheckerTestCase
 
-try:
-    from pylint.testutils import tokenize_str
-except ImportError:
-    from pylint.testutils import _tokenize_str as tokenize_str
+from pylint.testutils import _tokenize_str as tokenize_str
 
 import astroid
 

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist==py34,py35,py36,py37
+envlist==py36,py37,py38,py39
 skip_missing_interpreters=true
 
 [testenv]
@@ -22,7 +22,7 @@ deps=
 commands=
     pylint pylint_quotes
     flake8 --ignore E501 pylint_quotes
-    isort pylint_quotes -rc -c --diff
+    isort pylint_quotes -c --diff
 
 [testenv:deps]
 description=