Fix old scikit learn

Author: mvargas33

.github/workflows/main.yml

@@ -37,21 +37,15 @@ jobs:
         env:
           SKGGM_VERSION: a0ed406586c4364ea3297a658f415e13b5cbdaf8
         run:  |
-          sudo apt-get install liblapack-dev
-          pip install --upgrade pip pytest
-          pip install wheel cython numpy scipy codecov pytest-cov scikit-learn
           pip install git+https://github.com/skggm/skggm.git@${SKGGM_VERSION}
           pytest test --cov
           bash <(curl -s https://codecov.io/bash)
       - name: Run Tests with skggm + scikit-learn 0.20.3
         env:
           SKGGM_VERSION: a0ed406586c4364ea3297a658f415e13b5cbdaf8
         run:  |
-          sudo apt-get install liblapack-dev
-          pip install --upgrade pip pytest
-          pip install wheel cython numpy scipy codecov pytest-cov
+          pip uninstall scikit-learn
           pip install scikit-learn==0.20.3
-          pip install git+https://github.com/skggm/skggm.git@${SKGGM_VERSION}
           pytest test --cov
           bash <(curl -s https://codecov.io/bash)
       - name: Syntax checking with flake8