change python-igraph to igraph

INSTALL.rst

@@ -65,7 +65,7 @@ Install the latest version (Python Console)
 
 Install the *current* release of ``py4cytoscape`` with ``pip``::
 
-   pip install python-igraph requests pandas networkx colorbrewer chardet decorator backoff colour
+   pip install igraph requests pandas networkx colorbrewer chardet decorator backoff colour
    pip install py4cytoscape
 
 
@@ -75,19 +75,19 @@ Install the development version (Python Console)
 To install the *latest* py4cytoscape development version, instead
 of ``pip install py4cytoscape``, use::
 
-   pip install python-igraph requests pandas networkx colorbrewer chardet decorator backoff colour
+   pip install igraph requests pandas networkx colorbrewer chardet decorator backoff colour
    pip install git+https://github.com/cytoscape/py4cytoscape.git
 
 To install the py4cytoscape branch (for example 0.0.10) version, instead
 of ``pip install py4cytoscape``, use::
 
-   pip install python-igraph requests pandas networkx colorbrewer chardet decorator backoff colour
+   pip install igraph requests pandas networkx colorbrewer chardet decorator backoff colour
    pip install git+https://github.com/cytoscape/[email protected]
 
 Alternately, to install *a particular* py4cytoscape development version (e.g., 0.0.11), instead
 of ``pip install py4cytoscape``, use::
 
-   pip install python-igraph requests pandas networkx colorbrewer chardet decorator backoff colour
+   pip install igraph requests pandas networkx colorbrewer chardet decorator backoff colour
    git clone git://github.com/cytoscape/[email protected]
 
 Verify Cytoscape connection

doc/requirements.txt

@@ -4,7 +4,7 @@ networkx
 requests
 colorbrewer
 chardet
-python-igraph
+igraph
 sphinx_autodoc_typehints
 sphinx_rtd_theme
 ipykernel

setup.py

@@ -28,7 +28,7 @@
         'pandas',
         'networkx',
         'requests',
-        'python-igraph',
+        'igraph',
         'colorbrewer',
         'chardet',
         'decorator',