Merge branch 'new_attrs'

Closes #11

.travis.yml

@@ -1,10 +1,10 @@
 language: python
 python:
   - "2.7"
-  - "3.3"
   - "3.4"
   - "3.5"
   - "3.6"
+  - "3.7"
   - "pypy3.5"
 before_script:
   - wget https://github.com/kr/beanstalkd/archive/v1.10.tar.gz -O /tmp/beanstalkd.tar.gz

docs/source/CHANGES.rst

@@ -2,6 +2,12 @@
 pystalk ChangeLog
 #################
 
+====
+NEXT
+====
+* add compatibility for `attrs` 19.2.0 and above
+* drop support for Python 3.3.x
+
 =====
 0.5.1
 =====

pystalk/client.py

@@ -22,7 +22,13 @@ class Job(object):
     job_data = attr.ib()
 
 
-@attr.s(frozen=True, hash=True, cmp=True)
+if getattr(attr, "__version_info__", (0,)) >= (19, 2):
+    _attrs_kwargs = dict(eq=True)
+else:
+    _attrs_kwargs = dict(cmp=True)
+
+
+@attr.s(frozen=True, hash=True, **_attrs_kwargs)
 class BeanstalkError(Exception):
     """Common error raised when something goes wrong with beanstalk"""
 

setup.py

@@ -1,3 +1,4 @@
+import sys
 import os.path
 from setuptools import setup, find_packages
 
@@ -8,7 +9,13 @@
     for line in f:
         install_requires.append(line.rstrip())
 
-with open(os.path.join(project_root, 'README.md'), encoding='utf-8') as f:
+
+read_kwargs = {}
+
+if sys.version_info > (3, 0):
+    read_kwargs['encoding'] = 'utf-8'
+
+with open(os.path.join(project_root, 'README.md'), **read_kwargs) as f:
     long_description = f.read()
 
 
@@ -24,7 +31,7 @@
     license="ISC",
     install_requires=install_requires,
     packages=find_packages(exclude=['tests']),
-    python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, <4',
+    python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, <4',
     project_urls={
         'CI': 'https://travis-ci.org/EasyPost/pystalk',
     },
@@ -33,10 +40,10 @@
         "Environment :: Console",
         "Programming Language :: Python",
         "Programming Language :: Python :: 2.7",
-        "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",
         "Intended Audience :: System Administrators",
         "Operating System :: OS Independent",
         "Topic :: Database",