Dropped support for python 3.3

Not testable on Travis, end of life since 2017.

.travis.yml

@@ -1,10 +1,10 @@
 language: python
 
 python:
-  - "3.3"
   - "3.4"
   - "3.5"
   - "3.6"
+  - "3.7"
   - "nightly"
 
 install:

CHANGELOG.md

@@ -3,6 +3,7 @@ Changelog
 
 **0.22.0 (TBA)**
 
+* **BRAEAKING**: Dropped support for Python 3.3
 * Add `toot notifications` to show notifications (thanks @dlax)
 * Add posting and replying to curses interface (thanks @Skehmatics)
 * Add `--language` option to `toot post`

setup.py

@@ -29,14 +29,14 @@ setup(
         'Environment :: Console',
         'License :: OSI Approved :: GNU General Public License v3 (GPLv3)',
         'Programming Language :: Python :: 3',
-        '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',
     ],
     data_files=[('', ['Makefile'])],
     packages=['toot', 'toot.ui'],
-    python_requires=">=3.3",
+    python_requires=">=3.4",
     install_requires=[
         "requests>=2.13,<3.0",
         "beautifulsoup4>=4.5.0,<5.0",