chore: add support for pandas v2 (#481)

v2.0 supports python 3.8, while v2.1 and above only
supports python 3.9 and above. We need to support 1.5 as well,
due to not break backwards compatibility.

Refs: ECALC-1139

.github/workflows/lib-ci.yml

@@ -13,17 +13,21 @@ jobs:
 
   run-tests-with-coverage:
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: [ "3.8", "3.9" ]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
 
       - name: Install Poetry
         run: pipx install poetry
 
-      - name: Setup Python
+      - name: Setup Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
         with:
-          python-version: "3.8"
+          python-version: ${{ matrix.python-version }}
           cache: 'poetry'
 
       - name: Check pyproject.toml validity
@@ -40,6 +44,7 @@ jobs:
 
       - name: Get Test Coverage score
         id: total
+        if: matrix.python-version == '3.8'
         run: |
           poetry run python -m coverage report --fail-under 50
           poetry run python -m coverage html -d build/
@@ -52,7 +57,7 @@ jobs:
         run: poetry build
 
       - name: Push coverage report to coverage-report branch
-        if: ${{ github.ref == 'refs/heads/main' }}
+        if: github.ref == 'refs/heads/main' && matrix.python-version == '3.8'
         run: |
           cd build
           CREATED_FROM_REF=$(git rev-parse --short HEAD)