Make travis test against all 0.3.x PyTorch (close #12)

- Remove torch version from requirements.txt
- Ignore installed package
- Upgrade certifi and cffi

Author: kmkurn

.travis.yml

@@ -1,16 +1,20 @@
 language: python
+env:
+  - PYTORCH_VERSION=0.3.0
+  - PYTORCH_VERSION=0.3.1
 before_install:
   - wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O ~/miniconda.sh
   - bash ~/miniconda.sh -b -p $HOME/miniconda
   - export PATH="$HOME/miniconda/bin:$PATH"
   - conda update -y conda
   - conda create -y -n pytorch-crf python=3.6
   - source activate pytorch-crf
+  - conda install -y -c pytorch pytorch=$PYTORCH_VERSION
   # explicitly specify cudatoolkit version (see https://discuss.pytorch.org/t/libcudart-so-8-0-not-found-in-travis-ci/16071/3)
-  - conda install -y -c pytorch pytorch=0.3.0 cudatoolkit=8.0
+  - if [[ $PYTORCH_VERSION == "0.3.0" ]]; then conda install -y -c pytorch cudatoolkit=8.0; fi
   - export LD_LIBRARY_PATH="$HOME/miniconda/envs/pytorch-crf/lib:$LD_LIBRARY_PATH"
 install:
-  - pip install -r requirements.txt
+  - pip install --ignore-installed -r requirements.txt
   - pip install .
 script: pytest --cov
 after_success: coveralls

requirements.txt

@@ -1,6 +1,6 @@
 attrs==17.3.0
-certifi==2018.4.16
-cffi==1.10.0
+certifi==2018.10.15
+cffi==1.11.5
 chardet==3.0.4
 coverage==4.0.3
 flake8==3.5.0
@@ -20,6 +20,5 @@ python-coveralls==2.9.1
 PyYAML==3.12
 requests==2.18.4
 six==1.11.0
-torch==0.3.0.post4
 typed-ast==1.1.0
 urllib3==1.22