prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Need a .travis.yml file to properly run travis tests
  ^
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `setup.py`
  Content:
  ```
  1 # -*- coding: utf-8 -*-
  2 
  3 from setuptools import setup, find_packages
  4 
  5 
  6 with open('README.md') as f:
  7     readme = f.read()
  8 
  9 with open('LICENSE') as f:
  10     license = f.read()
  11 
  12 setup(
  13     name='viper',
  14     version='0.0.1',
  15     description='Viper Programming Language for Ethereum',
  16     long_description=readme,
  17     author='Vitalik Buterin',
  18     author_email='',
  19     url='https://github.com/ethereum/viper',
  20     license=license,
  21     packages=find_packages(exclude=('tests', 'docs')),
  22     install_requires=[
  23         'ethereum == 1.3.7',
  24         'serpent',
  25         'pytest-cov',
  26         'pytest-runner', # Must be after pytest-cov or it will not work
  27         #           due to https://github.com/pypa/setuptools/issues/196
  28     ],
  29     scripts=['bin/viper']
  30 )
  31
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/setup.py b/setup.py
  --- a/setup.py
  +++ b/setup.py
  @@ -20,7 +20,7 @@
       license=license,
       packages=find_packages(exclude=('tests', 'docs')),
       install_requires=[
  -        'ethereum == 1.3.7',
  +        'ethereum==2.0.4',
           'serpent',
           'pytest-cov',
           'pytest-runner', # Must be after pytest-cov or it will not work
  
verification_info: {"golden_diff": "diff --git a/setup.py b/setup.py\n--- a/setup.py\n+++ b/setup.py\n@@ -20,7 +20,7 @@\n     license=license,\n     packages=find_packages(exclude=('tests', 'docs')),\n     install_requires=[\n-        'ethereum == 1.3.7',\n+        'ethereum==2.0.4',\n         'serpent',\n         'pytest-cov',\n         'pytest-runner', # Must be after pytest-cov or it will not work\n", "issue": "Need a .travis.yml file to properly run travis tests\n^\n", "before_files": [{"content": "# -*- coding: utf-8 -*-\n\nfrom setuptools import setup, find_packages\n\n\nwith open('README.md') as f:\n    readme = f.read()\n\nwith open('LICENSE') as f:\n    license = f.read()\n\nsetup(\n    name='viper',\n    version='0.0.1',\n    description='Viper Programming Language for Ethereum',\n    long_description=readme,\n    author='Vitalik Buterin',\n    author_email='',\n    url='https://github.com/ethereum/viper',\n    license=license,\n    packages=find_packages(exclude=('tests', 'docs')),\n    install_requires=[\n        'ethereum == 1.3.7',\n        'serpent',\n        'pytest-cov',\n        'pytest-runner', # Must be after pytest-cov or it will not work\n        #           due to https://github.com/pypa/setuptools/issues/196\n    ],\n    scripts=['bin/viper']\n)\n", "path": "setup.py"}], "after_files": [{"content": "# -*- coding: utf-8 -*-\n\nfrom setuptools import setup, find_packages\n\n\nwith open('README.md') as f:\n    readme = f.read()\n\nwith open('LICENSE') as f:\n    license = f.read()\n\nsetup(\n    name='viper',\n    version='0.0.1',\n    description='Viper Programming Language for Ethereum',\n    long_description=readme,\n    author='Vitalik Buterin',\n    author_email='',\n    url='https://github.com/ethereum/viper',\n    license=license,\n    packages=find_packages(exclude=('tests', 'docs')),\n    install_requires=[\n        'ethereum==2.0.4',\n        'serpent',\n        'pytest-cov',\n        'pytest-runner', # Must be after pytest-cov or it will not work\n        #           due to https://github.com/pypa/setuptools/issues/196\n    ],\n    scripts=['bin/viper']\n)\n", "path": "setup.py"}]}