emptyStringTest: replace `len(value) == 0` with `value == ""` (gocritic)

unused-receiver: method receiver 'en' is not referenced in method's body, consider removing or renaming it as _ (revive)

import 'github.com/pkg/errors' is not allowed from list 'logger': Should be replaced by standard lib errors package. (depguard)

bool-compare: use assert.True (testifylint)

require-error: for error assertions use require (testifylint)

require-error: for error assertions use require (testifylint)

directive `// nolint: revive // its a private lib, we dont need an exported struct` should be written without leading space as `//nolint: revive // its a private lib, we dont need an exported struct` (nolintlint)