reqs: Lower bound hypothesis (#167)

* reqs: Lower bound hypothesis

Hypothesis should be lower bound instead of being fixed at 3.7.0

* chg: test: set min requirement for pytest

* chg: test: upgrade pip on travis

* chg: test: upgrade setuptools on travis

* chg: test: add py as test req on travis

.travis.yml

@@ -4,6 +4,8 @@ python:
   - "3.4"
   - "3.5"
 before_install:
+  - "pip install --upgrade setuptools"
+  - "pip install --upgrade pip"
   - "pip install -e .[tests]"
 install: "pip install -r requirements.txt"
 addons:

setup.py

@@ -15,7 +15,8 @@ with open('buku.py', encoding='utf-8') as f:
 with open('README.md', encoding='utf-8') as f:
     long_description = f.read()
 
-tests_require = ['pytest-cov', 'pytest-catchlog', 'hypothesis==3.7.0'],
+tests_require = [
+    'pytest-cov', 'pytest-catchlog', 'hypothesis>=3.7.0', 'pytest>=3.1.2', 'py>=1.4.33'],
 
 setup(
     name='buku',