Fix CI coverage reporting. (#457)

Package installs require `-e`, so we can correctly attribute the coverage to the different namespace packages.

Author: boehmseb

.coveragerc

@@ -8,11 +8,5 @@ source_pkgs = varats
 
 parallel = True
 
-[paths]
-source =
-  varats/varats/
-  */site-packages/varats/
-  */site-packages/varats-core/
-
 [report]
 ignore_errors = True

.github/workflows/ci.yml

@@ -18,6 +18,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v2
@@ -31,8 +33,8 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install ./varats-core
-        pip install ./varats
+        pip install -e ./varats-core
+        pip install -e ./varats
         pip install -r requirements.txt
         pip install codecov
         pip install pytest-cov