diff --git a/vendor/golang.org/x/sys/windows/syscall_windows.go b/vendor/golang.org/x/sys/windows/syscall_windows.go
index bea993b..e3b16c2 100644
--- a/vendor/golang.org/x/sys/windows/syscall_windows.go
+++ b/vendor/golang.org/x/sys/windows/syscall_windows.go
@@ -57,6 +57,10 @@
 	FILE_VOLUME_IS_COMPRESSED         = 0x00008000
 	FILE_VOLUME_QUOTAS                = 0x00000020
 
+	// Flags for LockFileEx.
+	LOCKFILE_FAIL_IMMEDIATELY = 0x00000001
+	LOCKFILE_EXCLUSIVE_LOCK   = 0x00000002
+
 	// Return values of SleepEx and other APC functions
 	STATUS_USER_APC    = 0x000000C0
 	WAIT_IO_COMPLETION = STATUS_USER_APC
@@ -160,6 +164,8 @@
 //sys	DeleteFile(path *uint16) (err error) = DeleteFileW
 //sys	MoveFile(from *uint16, to *uint16) (err error) = MoveFileW
 //sys	MoveFileEx(from *uint16, to *uint16, flags uint32) (err error) = MoveFileExW
+//sys	LockFileEx(file Handle, flags uint32, reserved uint32, bytesLow uint32, bytesHigh uint32, overlapped *Overlapped) (err error)
+//sys	UnlockFileEx(file Handle, reserved uint32, bytesLow uint32, bytesHigh uint32, overlapped *Overlapped) (err error)
 //sys	GetComputerName(buf *uint16, n *uint32) (err error) = GetComputerNameW
 //sys	GetComputerNameEx(nametype uint32, buf *uint16, n *uint32) (err error) = GetComputerNameExW
 //sys	SetEndOfFile(handle Handle) (err error)
@@ -172,13 +178,12 @@
 //sys	CancelIo(s Handle) (err error)
 //sys	CancelIoEx(s Handle, o *Overlapped) (err error)
 //sys	CreateProcess(appName *uint16, commandLine *uint16, procSecurity *SecurityAttributes, threadSecurity *SecurityAttributes, inheritHandles bool, creationFlags uint32, env *uint16, currentDir *uint16, startupInfo *StartupInfo, outProcInfo *ProcessInformation) (err error) = CreateProcessW
-//sys	OpenProcess(da uint32, inheritHandle bool, pid uint32) (handle Handle, err error)
+//sys	OpenProcess(desiredAccess uint32, inheritHandle bool, processId uint32) (handle Handle, err error)
 //sys	ShellExecute(hwnd Handle, verb *uint16, file *uint16, args *uint16, cwd *uint16, showCmd int32) (err error) = shell32.ShellExecuteW
+//sys	shGetKnownFolderPath(id *KNOWNFOLDERID, flags uint32, token Token, path **uint16) (ret error) = shell32.SHGetKnownFolderPath
 //sys	TerminateProcess(handle Handle, exitcode uint32) (err error)
 //sys	GetExitCodeProcess(handle Handle, exitcode *uint32) (err error)
 //sys	GetStartupInfo(startupInfo *StartupInfo) (err error) = GetStartupInfoW
-//sys	GetCurrentProcess() (pseudoHandle Handle, err error)
-//sys	GetCurrentThread() (pseudoHandle Handle, err error)
 //sys	GetProcessTimes(handle Handle, creationTime *Filetime, exitTime *Filetime, kernelTime *Filetime, userTime *Filetime) (err error)
 //sys	DuplicateHandle(hSourceProcessHandle Handle, hSourceHandle Handle, hTargetProcessHandle Handle, lpTargetHandle *Handle, dwDesiredAccess uint32, bInheritHandle bool, dwOptions uint32) (err error)
 //sys	WaitForSingleObject(handle Handle, waitMilliseconds uint32) (event uint32, err error) [failretval==0xffffffff]
@@ -234,7 +239,7 @@
 //sys	RegQueryInfoKey(key Handle, class *uint16, classLen *uint32, reserved *uint32, subkeysLen *uint32, maxSubkeyLen *uint32, maxClassLen *uint32, valuesLen *uint32, maxValueNameLen *uint32, maxValueLen *uint32, saLen *uint32, lastWriteTime *Filetime) (regerrno error) = advapi32.RegQueryInfoKeyW
 //sys	RegEnumKeyEx(key Handle, index uint32, name *uint16, nameLen *uint32, reserved *uint32, class *uint16, classLen *uint32, lastWriteTime *Filetime) (regerrno error) = advapi32.RegEnumKeyExW
 //sys	RegQueryValueEx(key Handle, name *uint16, reserved *uint32, valtype *uint32, buf *byte, buflen *uint32) (regerrno error) = advapi32.RegQueryValueExW
-//sys	getCurrentProcessId() (pid uint32) = kernel32.GetCurrentProcessId
+//sys	GetCurrentProcessId() (pid uint32) = kernel32.GetCurrentProcessId
 //sys	GetConsoleMode(console Handle, mode *uint32) (err error) = kernel32.GetConsoleMode
 //sys	SetConsoleMode(console Handle, mode uint32) (err error) = kernel32.SetConsoleMode
 //sys	GetConsoleScreenBufferInfo(console Handle, info *ConsoleScreenBufferInfo) (err error) = kernel32.GetConsoleScreenBufferInfo
@@ -243,6 +248,8 @@
 //sys	CreateToolhelp32Snapshot(flags uint32, processId uint32) (handle Handle, err error) [failretval==InvalidHandle] = kernel32.CreateToolhelp32Snapshot
 //sys	Process32First(snapshot Handle, procEntry *ProcessEntry32) (err error) = kernel32.Process32FirstW
 //sys	Process32Next(snapshot Handle, procEntry *ProcessEntry32) (err error) = kernel32.Process32NextW
+//sys	Thread32First(snapshot Handle, threadEntry *ThreadEntry32) (err error)
+//sys	Thread32Next(snapshot Handle, threadEntry *ThreadEntry32) (err error)
 //sys	DeviceIoControl(handle Handle, ioControlCode uint32, inBuffer *byte, inBufferSize uint32, outBuffer *byte, outBufferSize uint32, bytesReturned *uint32, overlapped *Overlapped) (err error)
 // This function returns 1 byte BOOLEAN rather than the 4 byte BOOL.
 //sys	CreateSymbolicLink(symlinkfilename *uint16, targetfilename *uint16, flags uint32) (err error) [failretval&0xff==0] = CreateSymbolicLinkW
@@ -254,6 +261,10 @@
 //sys	SetEvent(event Handle) (err error) = kernel32.SetEvent
 //sys	ResetEvent(event Handle) (err error) = kernel32.ResetEvent
 //sys	PulseEvent(event Handle) (err error) = kernel32.PulseEvent
+//sys	CreateMutex(mutexAttrs *SecurityAttributes, initialOwner bool, name *uint16) (handle Handle, err error) = kernel32.CreateMutexW
+//sys	CreateMutexEx(mutexAttrs *SecurityAttributes, name *uint16, flags uint32, desiredAccess uint32) (handle Handle, err error) = kernel32.CreateMutexExW
+//sys	OpenMutex(desiredAccess uint32, inheritHandle bool, name *uint16) (handle Handle, err error) = kernel32.OpenMutexW
+//sys	ReleaseMutex(mutex Handle) (err error) = kernel32.ReleaseMutex
 //sys	SleepEx(milliseconds uint32, alertable bool) (ret uint32) = kernel32.SleepEx
 //sys	CreateJobObject(jobAttr *SecurityAttributes, name *uint16) (handle Handle, err error) = kernel32.CreateJobObjectW
 //sys	AssignProcessToJobObject(job Handle, process Handle) (err error) = kernel32.AssignProcessToJobObject
@@ -264,6 +275,9 @@
 //sys	GetPriorityClass(process Handle) (ret uint32, err error) = kernel32.GetPriorityClass
 //sys	SetInformationJobObject(job Handle, JobObjectInformationClass uint32, JobObjectInformation uintptr, JobObjectInformationLength uint32) (ret int, err error)
 //sys	GenerateConsoleCtrlEvent(ctrlEvent uint32, processGroupID uint32) (err error)
+//sys	GetProcessId(process Handle) (id uint32, err error)
+//sys	OpenThread(desiredAccess uint32, inheritHandle bool, threadId uint32) (handle Handle, err error)
+//sys	SetProcessPriorityBoost(process Handle, disable bool) (err error) = kernel32.SetProcessPriorityBoost
 
 // Volume Management Functions
 //sys	DefineDosDevice(flags uint32, deviceName *uint16, targetPath *uint16) (err error) = DefineDosDeviceW
@@ -286,9 +300,47 @@
 //sys	SetVolumeLabel(rootPathName *uint16, volumeName *uint16) (err error) = SetVolumeLabelW
 //sys	SetVolumeMountPoint(volumeMountPoint *uint16, volumeName *uint16) (err error) = SetVolumeMountPointW
 //sys	MessageBox(hwnd Handle, text *uint16, caption *uint16, boxtype uint32) (ret int32, err error) [failretval==0] = user32.MessageBoxW
+//sys	ExitWindowsEx(flags uint32, reason uint32) (err error) = user32.ExitWindowsEx
+//sys	InitiateSystemShutdownEx(machineName *uint16, message *uint16, timeout uint32, forceAppsClosed bool, rebootAfterShutdown bool, reason uint32) (err error) = advapi32.InitiateSystemShutdownExW
+//sys	SetProcessShutdownParameters(level uint32, flags uint32) (err error) = kernel32.SetProcessShutdownParameters
+//sys	GetProcessShutdownParameters(level *uint32, flags *uint32) (err error) = kernel32.GetProcessShutdownParameters
+//sys	clsidFromString(lpsz *uint16, pclsid *GUID) (ret error) = ole32.CLSIDFromString
+//sys	stringFromGUID2(rguid *GUID, lpsz *uint16, cchMax int32) (chars int32) = ole32.StringFromGUID2
+//sys	coCreateGuid(pguid *GUID) (ret error) = ole32.CoCreateGuid
+//sys	CoTaskMemFree(address unsafe.Pointer) = ole32.CoTaskMemFree
+//sys	rtlGetVersion(info *OsVersionInfoEx) (ret error) = ntdll.RtlGetVersion
+//sys	rtlGetNtVersionNumbers(majorVersion *uint32, minorVersion *uint32, buildNumber *uint32) = ntdll.RtlGetNtVersionNumbers
 
 // syscall interface implementation for other packages
 
+// GetCurrentProcess returns the handle for the current process.
+// It is a pseudo handle that does not need to be closed.
+// The returned error is always nil.
+//
+// Deprecated: use CurrentProcess for the same Handle without the nil
+// error.
+func GetCurrentProcess() (Handle, error) {
+	return CurrentProcess(), nil
+}
+
+// CurrentProcess returns the handle for the current process.
+// It is a pseudo handle that does not need to be closed.
+func CurrentProcess() Handle { return Handle(^uintptr(1 - 1)) }
+
+// GetCurrentThread returns the handle for the current thread.
+// It is a pseudo handle that does not need to be closed.
+// The returned error is always nil.
+//
+// Deprecated: use CurrentThread for the same Handle without the nil
+// error.
+func GetCurrentThread() (Handle, error) {
+	return CurrentThread(), nil
+}
+
+// CurrentThread returns the handle for the current thread.
+// It is a pseudo handle that does not need to be closed.
+func CurrentThread() Handle { return Handle(^uintptr(2 - 1)) }
+
 // GetProcAddressByOrdinal retrieves the address of the exported
 // function from module by ordinal.
 func GetProcAddressByOrdinal(module Handle, ordinal uintptr) (proc uintptr, err error) {
@@ -1113,7 +1165,7 @@
 	return syscall.EWINDOWS
 }
 
-func Getpid() (pid int) { return int(getCurrentProcessId()) }
+func Getpid() (pid int) { return int(GetCurrentProcessId()) }
 
 func FindFirstFile(name *uint16, data *Win32finddata) (handle Handle, err error) {
 	// NOTE(rsc): The Win32finddata struct is wrong for the system call:
@@ -1241,3 +1293,78 @@
 
 	return n, nil
 }
+
+// GUIDFromString parses a string in the form of
+// "{XXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}" into a GUID.
+func GUIDFromString(str string) (GUID, error) {
+	guid := GUID{}
+	str16, err := syscall.UTF16PtrFromString(str)
+	if err != nil {
+		return guid, err
+	}
+	err = clsidFromString(str16, &guid)
+	if err != nil {
+		return guid, err
+	}
+	return guid, nil
+}
+
+// GenerateGUID creates a new random GUID.
+func GenerateGUID() (GUID, error) {
+	guid := GUID{}
+	err := coCreateGuid(&guid)
+	if err != nil {
+		return guid, err
+	}
+	return guid, nil
+}
+
+// String returns the canonical string form of the GUID,
+// in the form of "{XXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}".
+func (guid GUID) String() string {
+	var str [100]uint16
+	chars := stringFromGUID2(&guid, &str[0], int32(len(str)))
+	if chars <= 1 {
+		return ""
+	}
+	return string(utf16.Decode(str[:chars-1]))
+}
+
+// KnownFolderPath returns a well-known folder path for the current user, specified by one of
+// the FOLDERID_ constants, and chosen and optionally created based on a KF_ flag.
+func KnownFolderPath(folderID *KNOWNFOLDERID, flags uint32) (string, error) {
+	return Token(0).KnownFolderPath(folderID, flags)
+}
+
+// KnownFolderPath returns a well-known folder path for the user token, specified by one of
+// the FOLDERID_ constants, and chosen and optionally created based on a KF_ flag.
+func (t Token) KnownFolderPath(folderID *KNOWNFOLDERID, flags uint32) (string, error) {
+	var p *uint16
+	err := shGetKnownFolderPath(folderID, flags, t, &p)
+	if err != nil {
+		return "", err
+	}
+	defer CoTaskMemFree(unsafe.Pointer(p))
+	return UTF16ToString((*[(1 << 30) - 1]uint16)(unsafe.Pointer(p))[:]), nil
+}
+
+// RtlGetVersion returns the version of the underlying operating system, ignoring
+// manifest semantics but is affected by the application compatibility layer.
+func RtlGetVersion() *OsVersionInfoEx {
+	info := &OsVersionInfoEx{}
+	info.osVersionInfoSize = uint32(unsafe.Sizeof(*info))
+	// According to documentation, this function always succeeds.
+	// The function doesn't even check the validity of the
+	// osVersionInfoSize member. Disassembling ntdll.dll indicates
+	// that the documentation is indeed correct about that.
+	_ = rtlGetVersion(info)
+	return info
+}
+
+// RtlGetNtVersionNumbers returns the version of the underlying operating system,
+// ignoring manifest semantics and the application compatibility layer.
+func RtlGetNtVersionNumbers() (majorVersion, minorVersion, buildNumber uint32) {
+	rtlGetNtVersionNumbers(&majorVersion, &minorVersion, &buildNumber)
+	buildNumber &= 0xffff
+	return
+}