Pin versions on workflows

.github/workflows/constraints.txt

@@ -0,0 +1,3 @@
+pip==22.3.1
+poetry==1.2.2
+virtualenv==20.17.1

.github/workflows/integration.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8"]
+        python-version: ["3.9"]
 
     steps:
       - uses: actions/checkout@v2
@@ -25,11 +25,21 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
-      - name: Install dependencies
+      - name: Upgrade pip
+        run: |
+          pip install --constraint=.github/workflows/constraints.txt pip
+          pip --version
+
+      - name: Install Poetry
         run: |
           python -m pip install --upgrade pip
+          pipx install --pip-args=--constraint=.github/workflows/constraints.txt poetry
           python -m pip install --upgrade poetry
+          poetry --version
           poetry install
 
+      - name: Install dependencies
+        run: poetry install
+
       - name: Test integration
         run: ./scripts/test_integration.sh

.github/workflows/lint.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8"]
+        python-version: ["3.9"]
 
     steps:
       - uses: actions/checkout@v2

.github/workflows/test.yml

@@ -48,10 +48,18 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
-      - name: Install poetry
+      - name: Upgrade pip
+        run: |
+          pip install --constraint=.github/workflows/constraints.txt pip
+          pip --version
+
+      - name: Install Poetry
         run: |
           python -m pip install --upgrade pip
+          pipx install --pip-args=--constraint=.github/workflows/constraints.txt poetry
           python -m pip install --upgrade poetry
+          poetry --version
+          poetry install
 
       - name: Install dependencies
         run: poetry install