Added some caching to the workflows (#85)

.github/workflows/run_tests.yml

@@ -1,30 +1,54 @@
 name: Tests
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+env:
+  POETRY_VERSION: 1.5.1
 
 jobs:
   testing:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.8, 3.9, "3.10", "3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11"]
 
     steps:
-      - uses: actions/checkout@v2
+      - name: Checkout
+        uses: actions/checkout@v3
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
 
+      - name: Load cached Poetry installation
+        id: poetry
+        uses: actions/cache@v3
+        with:
+          path: ~/.local
+          key: poetry-install-${{env.POETRY_VERSION}}-${{ runner.os }}-${{ matrix.python-version }}
+
       - name: Install and configure Poetry
         uses: snok/install-poetry@v1
+        if: steps.poetry.outputs.cache-hit != 'true'
         with:
-          version: 1.5.1
+          version: ${{env.POETRY_VERSION}}
           virtualenvs-create: true
-          virtualenvs-in-project: true
+          virtualenvs-in-project: false
+
+      - name: Cache Poetry cache
+        uses: actions/cache@v3
+        id: cache
+        with:
+          path: ~/.cache/pypoetry
+          key: poetry-cache-${{env.POETRY_VERSION}}-${{ runner.os }}-${{ matrix.python-version }}-${{ hashFiles('**/pyproject.toml') }}
 
       - name: Install dependencies
+        if: steps.cache.outputs.cache-hit != 'true'
         run: poetry install -v -E toml -E yaml -E azure -E aws -E gcp -E vault
 
       - name: Run pytest