Add python{,3}-cftime to build dependencies.

debian/changelog

@@ -5,6 +5,7 @@ netcdf4-python (1.4.0-1) UNRELEASED; urgency=medium
   * Update Vcs-* URLs for Salsa.
   * Bump Standards-Version to 4.1.4, no changes.
   * Add module import tests to autopkgtest configuration.
+  * Add python{,3}-cftime to build dependencies.
 
  -- Bas Couwenberg <sebastic@debian.org>  Wed, 02 May 2018 07:09:36 +0200
 

debian/control

@@ -7,9 +7,11 @@ Priority: optional
 Build-Depends: debhelper (>= 9),
                dh-python,
                python-all-dev (>= 2.6.6-3~),
+               python-cftime,
                python-setuptools,
                python-numpy,
                python3-all-dev,
+               python3-cftime,
                python3-setuptools,
                python3-numpy,
                cython,