Bump networkx from 2.4 to 2.5 in /requirements

Bumps [networkx](https://github.com/networkx/networkx) from 2.4 to 2.5.
- [Release notes](https://github.com/networkx/networkx/releases)
- [Changelog](https://github.com/networkx/networkx/blob/master/doc/news.rst)
- [Commits](networkx/networkx@networkx-2.4...networkx-2.5)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements/requirements-ci.txt

@@ -98,7 +98,7 @@ mypy-extensions==0.4.3    # via -r requirements-dev.txt, mypy, raiden-contracts,
 mypy==0.782               # via -r requirements-dev.txt
 netaddr==0.7.19           # via -r requirements-dev.txt, matrix-synapse, multiaddr
 netifaces==0.10.9         # via -r requirements-dev.txt
-networkx==2.4             # via -r requirements-dev.txt
+networkx==2.5             # via -r requirements-dev.txt
 objgraph==3.4.1           # via -r requirements-dev.txt
 packaging==19.0           # via -r requirements-dev.txt, pytest, sphinx
 parsimonious==0.8.1       # via -r requirements-dev.txt, eth-abi

requirements/requirements-dev.txt

@@ -96,7 +96,7 @@ mypy-extensions==0.4.3    # via -r requirements.txt, mypy, raiden-contracts, typ
 mypy==0.782               # via -r requirements-dev.in
 netaddr==0.7.19           # via -r requirements.txt, matrix-synapse, multiaddr
 netifaces==0.10.9         # via -r requirements.txt
-networkx==2.4             # via -r requirements.txt
+networkx==2.5             # via -r requirements.txt
 objgraph==3.4.1           # via -r requirements.txt
 packaging==19.0           # via -r requirements-docs.txt, pytest, sphinx
 parsimonious==0.8.1       # via -r requirements.txt, eth-abi

requirements/requirements.txt

@@ -52,7 +52,7 @@ multiaddr==0.0.9          # via ipfshttpclient
 mypy-extensions==0.4.3    # via raiden-contracts, typing-inspect
 netaddr==0.7.19           # via multiaddr
 netifaces==0.10.9         # via -r requirements.in
-networkx==2.4             # via -r requirements.in
+networkx==2.5             # via -r requirements.in
 objgraph==3.4.1           # via -r requirements.in
 parsimonious==0.8.1       # via eth-abi
 protobuf==3.11.3          # via web3