fix: update golangci and fix lint errors

Author: kryanbeane

.golangci.bck.yaml

@@ -0,0 +1,11 @@
+run:
+  timeout: 10m
+linters:
+  enable:
+    - errcheck
+    - gosimple
+    - govet
+    - ineffassign
+    - staticcheck
+    - typecheck
+    - unused

.golangci.yaml

@@ -1,11 +1,20 @@
-run:
-  timeout: 10m
+version: "2"
 linters:
-  enable:
-    - errcheck
-    - gosimple
-    - govet
-    - ineffassign
-    - staticcheck
-    - typecheck
-    - unused
+  exclusions:
+    generated: lax
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    paths:
+      - third_party$
+      - builtin$
+      - examples$
+formatters:
+  exclusions:
+    generated: lax
+    paths:
+      - third_party$
+      - builtin$
+      - examples$