Added misspell and unparam linters

Author: sebasslash

.golangci.yml

@@ -16,6 +16,8 @@ linters:
     - revive #golint is deprecated and golangci-lint recommends to use revive instead https://github.com/mgechev/revive
     #other deprecated lint libraries: maligned, scopelint, interfacer
     - gocritic
+    - unparam
+    - misspell
 issues:
   exclude-rules:
   - path: _test\.go