[conda] pin tensorflow to next minor version

conda/meta.yaml

@@ -37,7 +37,7 @@ requirements:
     - {{ pin_compatible('scipy') }}
     - {{ pin_compatible('click') }}
     - {{ pin_compatible('click-plugins') }}
-    - {{ pin_compatible('tensorflow') }}  # [linux]
+    - {{ pin_compatible('tensorflow', max_pin='x.x') }}  # [linux]
   run_constrained:
     - {{ pin_compatible('scikit-learn') }}
     - {{ pin_compatible('matplotlib') }}