Update actions used in CI (#342)

Author: blegat

.github/workflows/ci.yml

@@ -26,21 +26,12 @@ jobs:
 #            os: ubuntu-latest
 #            arch: x64
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.version }}
           arch: ${{ matrix.arch }}
-      - uses: actions/cache@v1
-        env:
-          cache-name: cache-artifacts
-        with:
-          path: ~/.julia/artifacts
-          key: ${{ runner.os }}-test-${{ env.cache-name }}-${{ hashFiles('**/Project.toml') }}
-          restore-keys: |
-            ${{ runner.os }}-test-${{ env.cache-name }}-
-            ${{ runner.os }}-test-
-            ${{ runner.os }}-
+      - uses: julia-actions/cache@v1
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
         with:

.github/workflows/documentation.yml

@@ -12,7 +12,7 @@ jobs:
       # Fix for Plots with GR backend, see https://github.com/JuliaPolyhedra/Polyhedra.jl/pull/265
       GKSwstype: nul
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@latest
         with:
           # Build documentation on the latest Julia 1.x

.github/workflows/format_check.yml

@@ -14,7 +14,7 @@ jobs:
       - uses: julia-actions/setup-julia@latest
         with:
           version: '1'
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v4
       - name: Format check
         shell: julia --color=yes {0}
         run: |