BLD: force ABI compat on 3.6 / conda-forge build by specifying all deps

closes #17617

Author: jreback

ci/requirements-3.6.build

@@ -4,3 +4,16 @@ pytz
 nomkl
 numpy
 cython
+
+# these are not necessary for building, but will enforce consistency
+# with ABI differences; IOW, if numpy/scipy are updated but not
+# numexpr for example we would get errors later on when we tried to install
+# them, which would downgrade numpy to the previous ABI
+
+scipy
+numexpr
+pytables
+lxml
+pyarrow
+python-snappy
+fastparquet