CI: Regression test for nilearn<0.5.0

Author: effigies

.travis.yml

@@ -30,6 +30,10 @@ env:
       NIPYPE_EXTRAS="doc,tests,nipy,profiler"
       EXTRA_PIP_FLAGS="--pre $EXTRA_PIP_FLAGS --find-links $PRE_WHEELS"
       CI_SKIP_TEST=1
+    - INSTALL_DEB_DEPENDECIES=false
+      NILEARN_VERSION=0.4.2
+      NIPYPE_EXTRAS="doc,tests,profiler"
+      CI_SKIP_TEST=1
 
 # Python 3.4 is only available on Trusty, so we need to duplicate the
 # env matrix specifically for it.
@@ -85,6 +89,7 @@ before_install:
     export FSLOUTPUTTYPE=NIFTI_GZ;
   fi;
 
+- if [ -n "$NILEARN_VERSION" ]; then travis_retry pip install nilearn=$NILEARN_VERSION; fi
 - travis_retry pip install -r requirements.txt
 - travis_retry pip install grabbit==0.1.2
 - travis_retry git clone -b 0.6.5 https://github.com/INCF/pybids.git ${HOME}/pybids && pip install -e ${HOME}/pybids