ci(golangci): update config (ethereum-optimism#276)

Remove usage of depreciated values

Author: sambacha

.golangci.yml

@@ -1,13 +1,12 @@
 # This file configures github.com/golangci/golangci-lint.
+# see <https://golangci-lint.run/usage/configuration>
 
 run:
   timeout: 20m
   tests: true
   # default is true. Enables skipping of directories:
   #   vendor$, third_party$, testdata$, examples$, Godeps$, builtin$
-  skip-dirs-use-default: true
-  skip-files:
-    - core/genesis_alloc.go
+
 
 linters:
   disable-all: true
@@ -40,6 +39,9 @@ linters-settings:
     simplify: true
 
 issues:
+  exclude-dirs-use-default: true
+  exclude-dirs:
+    - core/genesis_alloc.go
   exclude-rules:
     - path: crypto/bn256/cloudflare/optate.go
       linters: