ci: always test latest numpy version and always set TEST environment …

…variable

.travis.yml

@@ -7,14 +7,15 @@ notifications:
   email: false
 env:
   matrix:
-  - NUMPY="1.11"
-  - NUMPY="1.12"
-  - NUMPY="1.13"
-  - NUMPY="1.14"
-  - TEST="FLAKE8"
+  - NUMPY="==1.11" TEST="PYTEST"
+  - NUMPY="==1.12" TEST="PYTEST"
+  - NUMPY="==1.13" TEST="PYTEST"
+  - NUMPY="==1.14" TEST="PYTEST"
+  - NUMPY=">=1.14" TEST="PYTEST"
+  - NUMPY=">=1.14" TEST="FLAKE8"
 install:
 # numpy (must be installed before pyfftw, unwrap)
-- travis_retry pip install "numpy==$NUMPY"
+- travis_retry pip install "numpy${NUMPY}"
 # everything else
 - "travis_retry pip install . --only-binary=:all:"
 - travis_retry pip install coverage coveralls
@@ -24,7 +25,7 @@ install:
 - pip freeze
 script:
 - set -ev
-- if [ "${TEST}" != "FLAKE8" ]; then
+- if [ "${TEST}" == "PYTEST" ]; then
        coverage run --source=radontea setup.py test;
        coverage report -m;
        codecov;