Use Go 1.18 for building & testing (#381)

Signed-off-by: Lukas Kämmerling <[email protected]>

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.17
+          go-version: 1.18
       - name: Print Go Version
         run: go version
       - name: Import GPG key

.github/workflows/ci.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go-version: [1.17]
+        go-version: [1.18]
     steps:
       - name: Set up Go ${{ matrix.go-version }}
         uses: actions/setup-go@v2

.github/workflows/release_on_tag.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.17
+          go-version: 1.18
       - name: Print Go Version
         run: go version
       - name: Decrypt Secrets

.gitlab-ci.yml

@@ -10,7 +10,7 @@ variables:
 
 test:tests:
   stage: test
-  image: golang:1.17
+  image: golang:1.18
   script:
     - |
       go test -v \