update requirements

setup.py

@@ -7,7 +7,7 @@ setup(name='blogit',
       version='0.0.1',
       license="GNU GPL",
       packages=find_packages(exclude=['tests']),
-      install_requires=['Jinja2', 'markdown2', 'tinydb'],
+      install_requires=['Jinja2', 'markdown2', 'tinydb', 'pygments'],
       tests_require=['pytest', 'beautifulsoup4'],
       entry_points={
               'console_scripts': ['blogit = blogit.blogit:main']