Add matplotlib and numpy as dependencies

packages/networkx/meta.yaml

@@ -10,6 +10,10 @@ requirements:
   run:
     - decorator
     - setuptools
+    # Upstream NetworkX has these as "soft" dependencies, but it's more
+    # convenient to have them come in automatically.
+    - matplotlib
+    - numpy
 
 test:
   imports:
@@ -38,4 +42,4 @@ test:
     - networkx.linalg
     - networkx.readwrite
     - networkx.readwrite.json_graph
-    - networkx.utils
+    - networkx.utils
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