Updated linter and fixed warnings

.golangci.yml

+run:
+  skip-dirs:
+  - legacy
+
 linters-settings:
   govet:
     check-shadowing: true
@@ -21,6 +25,9 @@ linters-settings:
 linters:
   enable-all: true
   disable:
+  - goimports
+  - gocritic
+  - gochecknoglobals
   - gosec
   - deadcode
   - dupl

.travis.yml

@@ -10,9 +10,7 @@ env:
 # build and immediately stop. It's sorta like having set -e enabled in bash.
 # Make sure golangci-lint is vendored.
 before_install:
-  - curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | bash -s -- -b $GOPATH/bin v1.10.2
-  # Download the binary to bin folder in $GOPATH
-  - curl -L -s https://github.com/golang/dep/releases/download/v${DEP_VERSION}/dep-linux-amd64 -o $GOPATH/bin/dep
+  - curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | bash -s -- -b $GOPATH/bin v1.16.0
 
 install: true
 

common/formatter/formatter.go

@@ -37,18 +37,14 @@ type Formatter interface {
 // PrintFunc represents a function used to print formatted data.
 type PrintFunc func(Formatter, interface{}) error
 
-var formatters map[string]Formatter
-var defaultFormatter Formatter
+var formatters = map[string]Formatter{
+	"text": &TextFormatter{},
+	"json": &JSONFormatter{},
+}
+var defaultFormatter = formatters["text"]
 
 var logger *logrus.Logger
 
-func init() {
-	formatters = make(map[string]Formatter, 2)
-	AddCustomFormatter("text", &TextFormatter{})
-	AddCustomFormatter("json", &JSONFormatter{})
-	defaultFormatter = formatters["text"]
-}
-
 // SetFormatter sets the defaults format to the one specified, if valid. Otherwise it returns an error.
 func SetFormatter(formatName string) error {
 	if !IsSupported(formatName) {

configs/navigate_test.go

@@ -36,9 +36,10 @@ func TestNavigate(t *testing.T) {
 		"inheritance",
 	}
 	for _, tt := range tests {
-		t.Run(tt, func(t *testing.T) {
-			pwd := paths.New("testdata", "navigate", tt, "first", "second")
-			golden := filepath.Join("testdata", "navigate", tt, "golden.yaml")
+		_tt := tt
+		t.Run(_tt, func(t *testing.T) {
+			pwd := paths.New("testdata", "navigate", _tt, "first", "second")
+			golden := filepath.Join("testdata", "navigate", _tt, "golden.yaml")
 
 			config, _ := configs.NewConfiguration()