add travis coveralls

.travis.yml

@@ -0,0 +1,35 @@
+language: python
+
+matrix:
+  include:
+    - os: linux
+
+python:
+  - 3.8
+
+before_install:
+    - sudo apt-get update
+    - wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh
+    - chmod +x miniconda.sh
+    - bash miniconda.sh -b -p $HOME/miniconda
+    - export PATH="$HOME/miniconda/bin:$PATH"
+    - hash -r
+    - conda config --set always_yes yes --set changeps1 no
+    - conda config --append channels conda-forge
+    - conda update -q conda
+    # Useful for debugging any issues with conda
+    - conda info -a
+
+install:
+  - conda install numpy
+  - conda install scipy
+  - conda install matplotlib
+  - conda install pandas
+  - conda install cvxpy
+  - conda install coveralls
+
+script:
+  - python --version
+
+after_success:
+  - coveralls