start porting test from Travis to Github-Actions

.github/workflows/sepp_tests.yml

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+name: SEPP_github_tests
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  python_tests:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout Repo
+      uses: actions/checkout@v3
+    - name: Set up Python
+      uses: actions/setup-python@v3
+    - name: setup conda
+      uses: conda-incubator/setup-miniconda@v2
+      with:
+        # This uses *miniforge*, rather than *minicond*. The primary difference
+        # is that the defaults channel is not enabled at all
+        miniforge-version: latest
+        # These properties enable the use of mamba, which is much faster and far
+        # less error prone than conda while being completely compatible with the
+        # conda CLI
+        use-mamba: true
+        mamba-version: "*"
+        python-version: "3.9"
+        environment-file: environment.yml
+    - name: install sepp
+      run: |
+        python setup.py config -c
+        python setup.py install
+    - name: run python tests
+      shell: bash -el {0}
+      run: |
+        nosetests test/unittest --with-doctest --with-coverage
+    - name: convert coverage
+      shell: bash -el {0}
+      run: |
+        coverage lcov
+    - name: send coverage report
+      uses: coverallsapp/github-action@master
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        path-to-lcov: "coverage.lcov"

sepp/environment.yml

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+name: sepp
+channels:
+  - conda-forge
+  - defaults
+dependencies:
+  - flake8
+  - nose
+  - coverage >= 6  # to ensure lcov option is available
+  - java-jdk
+  - pep8