Reconfigure dependabot

Reconfigures depenadabot to look at the requriements_tests.txt file.

This is necesary in order that the triggered tests run in an environment
where the installed dependencies reflect the bumped versions! (#100).

.github/dependabot.yml

@@ -7,7 +7,7 @@ version: 2
 updates:
   # Configuration for pip
   - package-ecosystem: "pip" # See documentation for possible values
-    directory: "/etc/requirements" # Location of package manifests
+    directory: "/etc/requirements_dependabot" # Location of package manifests
     schedule:
       interval: "daily"
 # for reference:

.github/workflows/build-test.yml

@@ -34,11 +34,11 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
           cache: 'pip'
-          cache-dependency-path: 'etc/requirements_tests.txt'
+          cache-dependency-path: 'etc/requirements_dependabot/requirements_tests.txt'
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install -r etc/requirements_tests.txt
+          pip install -r etc/requirements_dependabot/requirements_tests.txt
           pip install -e .
       - name: Lint with flake8
         # fail it if doesn't pass flake8

.github/workflows/release.yml

@@ -40,7 +40,7 @@ jobs:
         while [ $i -lt 12 ] && [ "${{ github.ref_name }}" != $(pip index versions -i https://test.pypi.org/simple --pre market_prices | cut -d'(' -f2 | cut -d')' -f1 | sed 1q) ];\
           do echo "waiting for package to appear in test index, i is $i, sleeping 5s"; sleep 5s; echo "woken up"; ((i++)); echo "next i is $i"; done
         pip install --index-url https://test.pypi.org/simple market_prices==${{ github.ref_name }} --no-deps
-        pip install -r etc/requirements/requirements.txt
+        pip install -r etc/requirements.txt
         python -c 'import market_prices;print(market_prices.__version__)'
 
     - name: Clean pip

etc/requirements_dependabot/why_here.txt

@@ -0,0 +1,8 @@
+requirements_test.txt is in this dedicated directory simply so that
+dependabot can be configured to look only at thses dependencies and ignore
+the additional requirements in requirements_dev.txt.
+
+Dependabot has to look at requirements_test.txt, as opposed to simply
+requirements.txt, in order that the tests triggered by the dependabot PR
+run in an environment that has installed the bumped versions of the
+dependencies.