perf changed to pyperf [skip ci]

dev-requirements.txt

@@ -11,6 +11,6 @@ astroid >= 2.2.5 ; python_version >= "3.4" and platform_python_implementation ==
 
 
 # benchmarks use this
-perf >= 1.6.0
+pyperf >= 1.6.1
 
 -e .[test,docs]