[chore] update lint configuration

.golangci.yml

@@ -15,13 +15,13 @@ run:
   # which dirs to skip: issues from them won't be reported;
   # can use regexp here: generated.*, regexp is applied on full path;
   # default value is empty list, but default dirs are skipped independently
-  # from this option's value (see skip-dirs-use-default).
-  skip-dirs:
+  # from this option's value (see exclude-dirs-use-default).
+  exclude-dirs:
     - third_party
 
   # default is true. Enables skipping of directories:
   #   vendor$, third_party$, testdata$, examples$, Godeps$, builtin$
-  skip-dirs-use-default: false
+  exclude-dirs-use-default: false
 
   # which files to skip: they will be analyzed, but issues from them
   # won't be reported. Default value is empty list, but there is
@@ -46,7 +46,7 @@ run:
 # output configuration options
 output:
   # colored-line-number|line-number|json|tab|checkstyle|code-climate, default is "colored-line-number"
-  format: colored-line-number
+  formats: colored-line-number
 
   # print lines of code with issue, default is true
   print-issued-lines: true
@@ -57,9 +57,6 @@ output:
 # all available settings of specific linters
 linters-settings:
   govet:
-    # report about shadowed variables
-    check-shadowing: true
-
     # settings per analyzer
     settings:
       printf: # analyzer name, run `go tool vet help` to see all analyzers