fix #132: support go-critic linter

Author: jirfag

.golangci.example.yml

@@ -130,7 +130,22 @@ linters-settings:
     simple: true
     range-loops: true # Report preallocation suggestions on range loops, true by default
     for-loops: false # Report preallocation suggestions on for loops, false by default
-
+  gocritic:
+    # which checks should be enabled; can't be combined with 'disabled-checks';
+    # default are: [appendAssign assignOp caseOrder dupArg dupBranchBody dupCase flagDeref
+    # ifElseChain regexpMust singleCaseSwitch sloppyLen switchTrue typeSwitchVar underef
+    # unlambda unslice rangeValCopy defaultCaseOrder];
+    # all checks list: https://github.com/go-critic/checkers
+    enabled-checks:
+      - rangeValCopy
+    # which checks should be disabled; can't be combined with 'enabled-checks'; default is empty
+    disabled-checks:
+      - regexpMust
+    settings: # settings passed to gocritic
+      captLocal: # must be valid enabled check name
+        checkLocals: true
+      rangeValCopy:
+        sizeThreshold: 32
 
 linters:
   enable: