CI: Test against RMS-locked environments

.github/workflows/test.yml

@@ -61,6 +61,67 @@ jobs:
 
       - name: Run just hypothesis tests with more examples
         run: pytest -n 4 tests --disable-warnings -m hypothesis --generate-plots
+
+  rms:
+    strategy:
+      matrix:
+        config:
+          - {
+            name: "RMS 12.1.4, 13.0.3, 13.1.0, 14.1.1"
+            os: ubuntu-latest
+            python: 3.8
+            pip: 23.2.1
+            wheel: 0.37.1
+            setuptools: 63.4.3
+            matplotlib: 3.3.2
+            numpy: 1.19.2
+            pandas: 1.1.3
+            scipy: 1.5.3
+            }
+            name: "RMS 14.2"
+            os: ubuntu-latest
+            python: 3.11
+            pip: 23.3.1
+            wheel: 0.37.1
+            setuptools: 63.4.3
+            matplotlib: 3.7.1
+            numpy: 1.24.3
+            pandas: 2.0.2
+            scipy: 1.10.1
+            }
+    name: ${{ matrix.config.name }}
+    runs-on: ${{ matrix.config.os }}
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup testdata
+        uses: "./.github/actions/setup_testdata"
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.config.python }}
+
+      - name: Build and install xtgeo
+        run: |
+          pip install pip==${{ matrix.config.pip }}
+          pip install \
+            wheel==${{ matrix.config.wheel }} \
+            setuptools==${{ matrix.config.setuptools }} \
+            matplotlib==${{ matrix.config.matplotlib }} \
+            numpy==${{ matrix.config.numpy }} \
+            pandas==${{ matrix.config.pandas }} \
+            scipy==${{ matrix.config.scipy }}
+          pip install ".[dev]"
+
+      - name: List dependencies
+        run: pip freeze
+
+      - name: Run tests
+        run: pytest -n 4 tests --disable-warnings
 
   big:
     runs-on: ubuntu-latest