use go1.11 with go mod

vendor/gopkg.in/go-playground/validator.v8/cache.go

@@ -1,71 +0,0 @@
-package validator
-
-import (
-	"reflect"
-	"sync"
-)
-
-type cachedField struct {
-	Idx       int
-	Name      string
-	AltName   string
-	CachedTag *cachedTag
-}
-
-type cachedStruct struct {
-	Name   string
-	fields map[int]cachedField
-}
-
-type structCacheMap struct {
-	lock sync.RWMutex
-	m    map[reflect.Type]*cachedStruct
-}
-
-func (s *structCacheMap) Get(key reflect.Type) (*cachedStruct, bool) {
-	s.lock.RLock()
-	value, ok := s.m[key]
-	s.lock.RUnlock()
-	return value, ok
-}
-
-func (s *structCacheMap) Set(key reflect.Type, value *cachedStruct) {
-	s.lock.Lock()
-	s.m[key] = value
-	s.lock.Unlock()
-}
-
-type cachedTag struct {
-	tag             string
-	isOmitEmpty     bool
-	isNoStructLevel bool
-	isStructOnly    bool
-	diveTag         string
-	tags            []*tagVals
-}
-
-type tagVals struct {
-	tagVals [][]string
-	isOrVal bool
-	isAlias bool
-	tag     string
-}
-
-type tagCacheMap struct {
-	lock sync.RWMutex
-	m    map[string]*cachedTag
-}
-
-func (s *tagCacheMap) Get(key string) (*cachedTag, bool) {
-	s.lock.RLock()
-	value, ok := s.m[key]
-	s.lock.RUnlock()
-
-	return value, ok
-}
-
-func (s *tagCacheMap) Set(key string, value *cachedTag) {
-	s.lock.Lock()
-	s.m[key] = value
-	s.lock.Unlock()
-}