remove 3.7 from CI, fix flake warnings

Author: gyermolenko

.travis.yml

@@ -6,9 +6,9 @@ sudo: false
 
 python:
   - "2.7"
+  - "3.4"
   - "3.5"
   - "3.6"
-  - "3.7"
 
 cache:
   - pip

setup.py

@@ -1,14 +1,14 @@
 from setuptools import setup
 
 setup(
-    name='python-patterns',
-    description='A collection of design patterns and idioms in Python.',
+    name="python-patterns",
+    description="A collection of design patterns and idioms in Python.",
     classifiers=[
-        'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.5',
-        'Programming Language :: Python :: 3.6',
-        'Programming Language :: Python :: 3.7',
+        "Programming Language :: Python :: 2",
+        "Programming Language :: Python :: 2.7",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.4",
+        "Programming Language :: Python :: 3.5",
+        "Programming Language :: Python :: 3.6",
     ],
-)
+)