Relax dependency version constraints. Drop Python 3.3 support. Fixes #100.

Author: kislyuk

.travis.yml

@@ -3,7 +3,6 @@ cache: pip
 
 python:
   - 2.7
-  - 3.3
   - 3.4
   - 3.5
   - 3.6
@@ -16,10 +15,10 @@ matrix:
       python: 2.7
       os: osx
     - language: generic
-      python: 3.3
+      python: 3.5
       os: osx
     - language: generic
-      python: 3.5
+      python: 3.6
       os: osx
   allow_failures:
     - python: pypy3

setup.py

@@ -12,17 +12,16 @@
     description='Python XML Signature library',
     long_description=open('README.rst').read(),
     install_requires=[
-        'lxml >= 3.5.0, < 4',
-        'defusedxml >= 0.4.1, < 0.6',
-        'eight >= 0.3.0, < 0.5',
-        'cryptography >= 1.8, < 2.1',
+        'lxml >= 3.5.0, < 5',
+        'defusedxml >= 0.4.1, < 1',
+        'eight >= 0.3.0, < 1',
+        'cryptography >= 1.8, < 3',
         'asn1crypto >= 0.21.0',
         'pyOpenSSL >= 0.15.1, < 18',
         'certifi >= 2015.11.20.1'
     ],
     extras_require={
-        ':python_version == "2.7"': ['enum34 >= 1.0.4'],
-        ':python_version == "3.3"': ['enum34 >= 1.0.4']
+        ':python_version == "2.7"': ['enum34 >= 1.0.4']
     },
     packages=find_packages(exclude=['test']),
     platforms=['MacOS X', 'Posix'],
@@ -37,7 +36,6 @@
         'Operating System :: POSIX',
         'Programming Language :: Python',
         'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Topic :: Software Development :: Libraries :: Python Modules'