Add wsl linter and fix

Signed-off-by: Émile Ré <emile@probo.com>

.golangci.yml

@@ -0,0 +1,20 @@
+version: "2"
+
+linters:
+  default: none
+  enable:
+    - errcheck
+    - govet
+    - ineffassign
+    - staticcheck
+    - wsl_v5
+  settings:
+    wsl_v5:
+      allow-first-in-block: true
+      allow-whole-block: false
+      branch-max-lines: 2
+      case-max-lines: 0
+      cuddle-max-statements: 1
+      default: default
+      enable:
+        - after-block