Update CI versions

Author: lpil

.github/workflows/test.yml

@@ -11,11 +11,11 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.0.0
+      - uses: actions/checkout@v3
       - uses: erlef/setup-beam@v1
         with:
           otp-version: "25.1"
-          gleam-version: "0.27.0"
+          gleam-version: "0.30.5"
           rebar3-version: "3"
       - run: gleam format --check src test
       - run: gleam deps download