update dependencies (#296)

vendor/git.iim.gay/grufwub/go-mutexes/mutex_safe.go

@@ -1,39 +0,0 @@
-package mutexes
-
-import "sync"
-
-// WithSafety wrapps the supplied Mutex to protect unlock fns
-// from being called multiple times
-func WithSafety(mu Mutex) Mutex {
-	return &safeMutex{mu: mu}
-}
-
-// WithSafetyRW wrapps the supplied RWMutex to protect unlock
-// fns from being called multiple times
-func WithSafetyRW(mu RWMutex) RWMutex {
-	return &safeRWMutex{mu: mu}
-}
-
-// safeMutex simply wraps a Mutex to add multi-unlock safety
-type safeMutex struct{ mu Mutex }
-
-func (mu *safeMutex) Lock() func() {
-	unlock := mu.mu.Lock()
-	once := sync.Once{}
-	return func() { once.Do(unlock) }
-}
-
-// safeRWMutex simply wraps a RWMutex to add multi-unlock safety
-type safeRWMutex struct{ mu RWMutex }
-
-func (mu *safeRWMutex) Lock() func() {
-	unlock := mu.mu.Lock()
-	once := sync.Once{}
-	return func() { once.Do(unlock) }
-}
-
-func (mu *safeRWMutex) RLock() func() {
-	unlock := mu.mu.RLock()
-	once := sync.Once{}
-	return func() { once.Do(unlock) }
-}