Test only with currently supported versions of Python (#32)

* Test only with currently supported versions of Python

* Add classifiers to reflect supported versions of Python

They will be shown in PyPI.

* Reflect supported versions in README

* Add explicit versions of yarl to work around vcrpy problem

vcrpy depends on a version of yarl that supports only python 3.6
onwards.

So this uses no yarl for 2.7, and the compatible versions for the 3.X
python versions.

This fixes #33

* Bump version to 1.3.0

.travis.yml

@@ -2,9 +2,10 @@ language: python
 
 python:
   - "2.7"
-  - "3.4"
   - "3.5"
   - "3.6"
+  - "3.7"
+  - "3.8-dev"
 
 install:
   - pip install -r requirements.txt

README.md

@@ -29,7 +29,7 @@
 
 ## Installation
 
-This library requires Python 2.7 or 3.3 to 3.6.
+This library requires Python 2.7 or 3.5 to 3.8.
 
 ```sh
 pip install chartmogul

chartmogul/__init__.py

@@ -24,12 +24,12 @@
 
 Provides convenient Python bindings for ChartMogul's API.
 
-:copyright: (c) 2017 by ChartMogul Ltd.
+:copyright: (c) 2019 by ChartMogul Ltd.
 :license: MIT, see LICENSE for more details.
 """
 
 __title__ = 'chartmogul'
-__version__ = '1.2.5'
+__version__ = '1.3.0'
 __build__ = 0x000000
 __author__ = 'ChartMogul Ltd'
 __license__ = 'MIT'

setup.py

@@ -21,10 +21,14 @@
     'future>=0.16.0',
 ]
 test_requirements = [
+    # This is needed to circumvent a vcrpy dependency problem And can be
+    # deleted once it is solved.
+    'yarl; python_version>"3.5"',
+    'yarl<1.4; python_version=="3.5"',
+
     'mock>=1.0.1',
     'requests-mock>=1.3.0',
     'vcrpy>=1.11.1',
-    'httpretty>=0.9.5',
     'PyYAML>=5.1.2',
     'httpretty>=0.9.6',
     'wrapt>=1.11.2'
@@ -56,4 +60,14 @@
     tests_require=test_requirements,
     test_suite="test",
     extras_require={},
+    classifiers=[
+        'Programming Language :: Python',
+        '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 :: 3.8'
+    ]
 )