Change Miniconda-latest to Miniconda3-latest (#264)

* Change Miniconda-latest to Miniconda3-latest

"Note: the Miniconda-latest-* installers are Miniconda2-* installers."
(https://repo.continuum.io/miniconda/)

* Specify Numba version to be 0.28.1

.travis.yml

@@ -16,7 +16,7 @@ branches:
     - master
 
 before_install:
-  - 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 -p /home/travis/miniconda
   - export PATH=/home/travis/miniconda/bin:$PATH
@@ -25,7 +25,7 @@ before_install:
   #- sudo ln -s /run/shm /dev/shm
 
 install:
-  - conda install --yes python=$TRAVIS_PYTHON_VERSION ipython numpy scipy matplotlib nose pandas pip sympy pytables statsmodels numba
+  - conda install --yes python=$TRAVIS_PYTHON_VERSION ipython numpy scipy matplotlib nose pandas pip sympy pytables statsmodels numba=0.28.1
     # To Install Full Anaconda Stack (conda install --yes python=$TRAVIS_PYTHON_VERSION anaconda)
   - pip install coveralls coverage
   - python setup.py install