Drop support for pytest-2.6.4

Now using hookwrapper decorator, supported only by >= 2.7

Author: nicoddemus

.travis.yml

@@ -13,8 +13,6 @@ matrix:
     - env: PYTEST_VERSION=2.7.0 PYTEST_QT_API=pyqt5
 
 env:
- - PYTEST_VERSION=2.6.4 PYTEST_QT_API=pyqt4
- - PYTEST_VERSION=2.6.4 PYTEST_QT_API=pyside
  - PYTEST_VERSION=2.7.0 PYTEST_QT_API=pyqt4
  - PYTEST_VERSION=2.7.0 PYTEST_QT_API=pyside
  - PYTEST_VERSION=2.7.0 PYTEST_QT_API=pyqt5

setup.py

@@ -32,7 +32,7 @@ def run_tests(self):
     entry_points={
         'pytest11': ['pytest-qt = pytestqt.plugin'],
     },
-    install_requires=['pytest>=2.3.4'],
+    install_requires=['pytest>=2.7.0'],
 
     # metadata for upload to PyPI
     author="Bruno Oliveira",