add depot caching (#25)

Author: IanButterworth

README.md

@@ -30,7 +30,8 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
+      - uses: julia-actions/cache@v1
       - name: Install JuliaFormatter and format
         run: |
           julia  -e 'import Pkg; Pkg.add("JuliaFormatter")'

action.yml

@@ -5,6 +5,7 @@ runs:
   steps:
     - uses: actions/checkout@v4
     - uses: julia-actions/setup-julia@v1
+    - uses: julia-actions/cache@v1
     - name: 'Install JuliaFormatter'
       run: |
         julia -e '