ci: bump go versions

Author: zimbatm

.github/workflows/go.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: [ '1.14', '1.15', '1.16', '1.17' ]
+        go: [ '1.18' ]
     steps:
 
     - name: Set up Go ${{ matrix.go }}

.github/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
         name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.15
+          go-version: 1.18
       -
         name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v2