Deprecate python 2.7

Update miniconda versions


Re-Add name

appveyor.yml

@@ -2,8 +2,10 @@ build: false
 
 environment:
   matrix:
-    - PYTHON_VERSION: 2.7
-      MINICONDA: C:\Miniconda-x64
+    - PYTHON_VERSION: 3.8
+      MINICONDA: C:\Miniconda38-x64
+    - PYTHON_VERSION: 3.7
+      MINICONDA: C:\Miniconda37-x64
 
 init:
   - "ECHO %PYTHON_VERSION% %MINICONDA%"
@@ -13,15 +15,15 @@ install:
   - conda config --set always_yes yes --set changeps1 no
   - conda update -q conda
   - conda info -a
-  - conda create --name lightfm numpy scipy scikit-learn
+  - conda create --name lightfm -c conda-forge numpy scipy scikit-learn
   - activate lightfm
 
   # Install the build dependencies of the project.
-  - conda install --yes --file test-requirements.txt
+  - conda install -c conda-forge --yes --file test-requirements.txt
 
   # Install lightfm
   - pip install -e .
 
 test_script:
   # Run the project tests
-  - py.test tests/ -x
+  - pytest tests/