test latest python with old and new numpy (#74)

test latest python with old and new numpy

.travis.yml

@@ -9,8 +9,10 @@ env:
 matrix:
   fast_finish: true
   include:
-    - name: "python-3.7"
-      env: PY=3.7
+    - name: "python-3.7 numpy=1.11"
+      env: PY=3.7 NP=1.11
+    - name: "python-3.7 numpy=1.16"
+      env: PY=3.7 NP=1.16
     - name: "python-3.6"
       env: PY=3.6
     - name: "python-2.7"
@@ -26,18 +28,19 @@ matrix:
 before_install:
   # Install miniconda and create TEST env.
   - |
-    wget http://bit.ly/miniconda -O miniconda.sh
+    wget https://repo.anaconda.com/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh
     bash miniconda.sh -b -p $HOME/miniconda
     export PATH="$HOME/miniconda/bin:$PATH"
     conda config --set always_yes yes --set changeps1 no --set show_channel_urls true
     conda update conda --quiet
-    conda install pycryptosat --quiet
     conda config --add channels conda-forge --force
-    conda config --set sat_solver pycryptosat
     conda config --set channel_priority strict
     conda config --set safety_checks disabled
     conda create --name TEST python=$PY --file requirements.txt --file requirements-dev.txt
     source activate TEST
+    if [[ -n "$NP" ]]; then
+      conda install numpy=$NP
+    fi
 
 install:
     - python setup.py sdist && version=$(python setup.py --version) && pushd dist  && pip install --no-deps --force-reinstall UTide-${version}.tar.gz && popd