Use miniconda3 in Travis CI config

.travis.yml

@@ -12,13 +12,13 @@ before_install:
   - sudo add-apt-repository -y ppa:marutter/rdev
   - sudo apt-get update -qq
   - sudo apt-get install -qq libatlas-dev libatlas-base-dev liblapack-dev gfortran r-base
-  - wget http://repo.continuum.io/miniconda/Miniconda-latest-Linux-x86_64.sh -O miniconda.sh
+  - wget http://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh
   - chmod +x miniconda.sh
   - ./miniconda.sh -b
-  - export PATH=/home/travis/miniconda2/bin:$PATH
+  - export PATH=/home/travis/miniconda3/bin:$PATH
   - conda update --yes conda
   - travis_retry conda install --yes python=$TRAVIS_PYTHON_VERSION --file requirements.txt
-  - sudo rm /home/travis/miniconda2/lib/libgfortran* # get rid of conflicting lib (rpy2/R)
+  - sudo rm /home/travis/miniconda3/lib/libgfortran* # get rid of conflicting lib (rpy2/R)
   - pip install pytest pytest-cov
   - pip install coveralls
 install: