Update Go to 1.18 and Alpine to 3.16

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

.github/workflows/e2e.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         helm-version:
-          - 3.8.1
+          - 3.9.0
     runs-on: ubuntu-latest
     steps:
       - name: Checkout

.github/workflows/test.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.17.x
+          go-version: 1.18.x
       - name: Setup CUE
         uses: cue-lang/setup-cue@main
       - name: Run unit tests