Merge pull request #6 from mloskot/doc-update

Update README.md

Author: mloskot

README.md

@@ -7,7 +7,11 @@ Python module and script to manage GitHub labels the saner way:
 
 ## Requirements
 
-* [PyGithub](https://github.com/PyGithub/PyGithub) 1.39+ with [PR#738](https://github.com/PyGithub/PyGithub/pull/738)
+* [PyGithub](https://github.com/PyGithub/PyGithub) 1.56
+
+## Installation
+
+`pip install gh-label-maker`
 
 ## Usage
 
@@ -32,4 +36,4 @@ cd github-label-maker
 pip install -e .
 
 # develop and make a pull request!
-```
+```