build(deps): bump actions/checkout from 3 to 4 (#28)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jirka Borovec <6035284+Borda@users.noreply.github.com>

.github/workflows/ci-testing.yml

@@ -26,7 +26,7 @@ jobs:
     timeout-minutes: 35
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v4
       with:

.github/workflows/cleanup-caches.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Cleanup
         run: |

.github/workflows/docs-deploy.yml

@@ -11,8 +11,8 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
     - name: Checkout 🛎️
-      uses: actions/checkout@v3
-      # If you're using actions/checkout@v3 you must set persist-credentials to false in most cases for the deployment to work correctly.
+      uses: actions/checkout@v4
+      # If you're using actions/checkout@v4 you must set persist-credentials to false in most cases for the deployment to work correctly.
       with:
         persist-credentials: false
     - uses: actions/setup-python@v4

.github/workflows/release-pypi.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v4
       with:
         python-version: 3.8

requirements.txt

@@ -1,2 +1,4 @@
 lightning >=2.0.0
 hivemind >=1.1.0, <=1.1.5; sys_platform == 'linux'
+
+pydantic <2.0.0  # fixme: lift when resolved