ci: set fetch-depth to 0 so that tags are fetched

We need this for getting correct version from setuptools_scm.

Author: skshetry

.github/workflows/release.yml

@@ -10,6 +10,8 @@ jobs:
     steps:
     - name: Check out the repository
       uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
 
     - name: Set up Python 3.7
       uses: actions/setup-python@v2

.github/workflows/tests.yml

@@ -15,6 +15,8 @@ jobs:
     steps:
     - name: Check out the repository
       uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
 
     - name: Set up Python ${{ matrix.pyv }}
       uses: actions/setup-python@v2