Install ScipOpt in Workflow

.github/workflows/rust.yml

@@ -6,9 +6,16 @@ jobs:
   build_and_test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - name: Install scip via anaconda
-        run: conda install --channel conda-forge scip -y
+      - uses: actions/checkout@v3
+      - uses: conda-incubator/setup-miniconda@v2
+        with:
+          activate-environment: test
+          allow-softlinks: true
+      - name: Install dependencies (SCIPOptSuite)
+        run: |
+          conda install -y --prefix $CONDA/envs/test --channel conda-forge scip
+          echo "LD_LIBRARY_PATH=$CONDA/envs/test/lib" >> "${GITHUB_ENV}"
+          echo "CONDA_PREFIX=$CONDA/envs/test" >> "${GITHUB_ENV}"
       - name: Build
         run: cargo build --release --all-features --verbose
       - name: Test