fix: requirements file should be in sources distribution (#58)

Author: bednar

CHANGELOG.md

@@ -8,6 +8,7 @@
 
 ### Bugs
 1. [#56](https://github.com/influxdata/influxdb-client-python/pull/56): Fix default tags for write batching, added new test
+1. [#58](https://github.com/influxdata/influxdb-client-python/pull/58): Source distribution also contains: requirements.txt, extra-requirements.txt and test-requirements.txt
 
 ## 1.3.0 [2020-01-17]
 

setup.py

@@ -38,6 +38,7 @@
     test_suite='tests',
     python_requires='>=3.6',
     include_package_data=True,
+    data_files=['requirements.txt', 'extra-requirements.txt', 'test-requirements.txt'],
     classifiers = [
         'Development Status :: 4 - Beta',
         'Intended Audience :: Developers',