Fix golangci-lint config for v2+ format compatibility

.golangci.yml

@@ -1,12 +1,8 @@
-version: "2"
-
 run:
   timeout: 5m
   tests: true
 
 linters:
-  default: standard
-
   enable:
     - dupl
     - goconst
@@ -17,7 +13,7 @@ linters:
     - unconvert
     - unparam
 
-  settings:
+linters-settings:
   dupl:
     threshold: 100
   errcheck:
@@ -39,13 +35,10 @@ linters:
       - name: var-naming
       - name: exported
 
-  exclusions:
-    generated: lax
-    paths:
-      - third_party$
-      - builtin$
-      - examples$
-    rules:
+issues:
+  max-issues-per-linter: 0
+  max-same-issues: 0
+  exclude-rules:
     - path: _test\.go
       linters:
         - dupl
@@ -72,7 +65,3 @@ linters:
       text: G304.*file inclusion via variable
     - path: (.+)\.go$
       text: 'G301: Expect directory permissions'
-
-issues:
-  max-issues-per-linter: 0
-  max-same-issues: 0