Update ci.yml GitHub action (#26)

Author: odow

.github/workflows/ci.yml

@@ -13,16 +13,9 @@ jobs:
       - uses: julia-actions/setup-julia@latest
         with:
           version: '1'
-      - uses: actions/checkout@v1
-      - shell: bash
-        env:
-          WLSLICENSE: ${{ secrets.WLSLICENSE }}
-        run: |
-          mkdir -p /opt/gurobi
-          echo "$WLSLICENSE" > /opt/gurobi/gurobi.lic
-      - name: Install
-        run: julia --project=. -e 'import Pkg; Pkg.instantiate()'
-      - name: Test
+      - uses: actions/checkout@v4
+      - run: echo "${{ secrets.GUROBI_LICENSE }}" > ~/gurobi.lic
+      - run: julia --project=. -e 'import Pkg; Pkg.instantiate()'
+      - run: julia --project=. test/runtests.jl
         env:
           JULIA_CMD: julia
-        run: julia --project=. test/runtests.jl