CI: adding make to tox allowlist

Author: bsipocz

tox.ini

@@ -28,7 +28,7 @@ deps =
     devdeps: matplotlib>=0.0.dev0
     devdeps: pandas>=0.0.dev0
 
-allowlist_externals = bash
+allowlist_externals = bash, make
 
 commands =
     # Force numpy reinstall to work around upper version limits in downstream dependencies (e.g. pandas)