☕ Upgrade action/cache to v3

To avoid Node.js 12 actions are deprecated warnings

Author: lambdalisue

.github/workflows/test.yml

@@ -43,7 +43,7 @@ jobs:
       - uses: denoland/setup-deno@v1
         with:
           deno-version: "${{ matrix.version }}"
-      - uses: actions/cache@v2
+      - uses: actions/cache@v3
         with:
           path: ${{ env.DENO_DIR }}
           key: ${{ runner.os }}-deno-${{ matrix.version }}-${{ hashFiles('**/*.ts') }}
@@ -85,7 +85,7 @@ jobs:
       - uses: denoland/setup-deno@v1
         with:
           deno-version: "${{ matrix.version }}"
-      - uses: actions/cache@v2
+      - uses: actions/cache@v3
         id: cache
         with:
           path: ${{ env.DENO_DIR }}