ci: replace superlinter with megalinter (#923)

* ci: replace superlinter with megalinter

Signed-off-by: hackercat <me@hackerc.at>

* fix: apply lint recommendations

Signed-off-by: hackercat <me@hackerc.at>

.github/dependabot.yml

@@ -5,11 +5,11 @@
 
 version: 2
 updates:
-  - package-ecosystem: "github-actions"
-    directory: "/"
+  - package-ecosystem: 'github-actions'
+    directory: '/'
     schedule:
-      interval: "weekly"
-  - package-ecosystem: "gomod"
-    directory: "/"
+      interval: 'weekly'
+  - package-ecosystem: 'gomod'
+    directory: '/'
     schedule:
-      interval: "weekly"
+      interval: 'weekly'

.github/linters/.golangci.yml

@@ -1 +0,0 @@
-../../.golangci.yml

.github/linters/.markdown-lint.yml

@@ -1 +0,0 @@
-../../.markdownlint.yml

.github/workflows/checks.yml

@@ -5,6 +5,7 @@ env:
   ACT_OWNER: ${{ github.repository_owner }}
   ACT_REPOSITORY: ${{ github.repository }}
   GO_VERSION: 1.17
+  CGO_ENABLED: 0
 
 jobs:
   lint:
@@ -18,22 +19,15 @@ jobs:
         with:
           go-version: ${{ env.GO_VERSION }}
       - uses: golangci/golangci-lint-action@v2
-        env:
-          CGO_ENABLED: 0
         with:
           version: latest
-      - uses: github/super-linter@v3
+      - uses: megalinter/megalinter/flavors/go@v5
         env:
           DEFAULT_BRANCH: master
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          FILTER_REGEX_EXCLUDE: .*testdata/*
           VALIDATE_ALL_CODEBASE: false
-          VALIDATE_BASH: false
-          VALIDATE_DOCKERFILE: false
-          VALIDATE_DOCKERFILE_HADOLINT: false
-          VALIDATE_GO: false # it's broken, see commit message
-          VALIDATE_JSCPD: false
-          VALIDATE_SHELL_SHFMT: false
+          GITHUB_STATUS_REPORTER: ${{ !env.ACT }}
+          GITHUB_COMMENT_REPORTER: ${{ !env.ACT }}
 
   test-linux:
     name: test-linux
@@ -55,8 +49,6 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-go-
       - run: go test -v -cover -coverprofile=coverage.txt -covermode=atomic ./...
-        env:
-          CGO_ENABLED: 0
       - name: Upload Codecov report
         uses: codecov/codecov-action@v2.1.0
         with: