try pin zarr under 2.18

.github/workflows/main.yml

@@ -12,12 +12,12 @@ jobs:
   lint-code:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
-      - name: Set up Python 3.11
-        uses: actions/setup-python@v2
+      - name: Set up Python 3.12
+        uses: actions/setup-python@v5
         with:
-          python-version: "3.11"
+          python-version: "3.12"
 
       - name: Install apt dependencies
         run: |
@@ -42,25 +42,25 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ["3.9", "3.11"]
+        python-version: ["3.9", "3.12"]
 
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Install apt dependencies
       run: |
         sudo apt-get update
         sudo apt-get install -y libopenmpi-dev openmpi-bin libhdf5-serial-dev
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
 
     - name: Install pip dependencies
       run: |
-        pip install "zarr<2.13"
+        pip install "zarr<2.16"
         pip install -e .
         pip install -e .[mpi]
         pip install -e .[compression]
@@ -81,10 +81,10 @@ jobs:
 
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Set up Python 3.12
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: "3.12"