Set max_pin of numpy and numba to minor versions

Prevents matching with a new minor version of numpy (they tend to not be compatible).

Fixes an issue with the latest numba version (0.56.2) requiring setuptools<60.

bob/devtools/data/conda_build_config.yaml

@@ -259,6 +259,10 @@ pin_run_as_build:
     max_pin: x
   nspr:
     max_pin: x
+  numba:
+    max_pin: x.x
+  numpy:
+    max_pin: x.x
   occt:
     max_pin: x.x
   openturns: