Bump CI deps

Author: michalmuskala

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ on:
 jobs:
   mix_test:
     name: mix test (Elixir ${{matrix.elixir}} | OTP ${{matrix.otp}})
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
@@ -53,7 +53,7 @@ jobs:
           mix local.rebar --force
           mix deps.get --only test
       - name: Cache build artifacts
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: |
             ~/.hex
@@ -80,7 +80,7 @@ jobs:
           mix local.rebar --force
           mix deps.get --only test
       - name: Cache build artifacts
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: |
             ~/.hex