upgrade deps; rewrite smtp session

vendor/github.com/getsentry/sentry-go/profiler_windows.go

@@ -0,0 +1,24 @@
+package sentry
+
+import (
+	"sync"
+	"syscall"
+)
+
+// This works around the ticker resolution on Windows being ~15ms by default.
+// See https://github.com/golang/go/issues/44343
+func setTimeTickerResolution() {
+	var winmmDLL = syscall.NewLazyDLL("winmm.dll")
+	if winmmDLL != nil {
+		var timeBeginPeriod = winmmDLL.NewProc("timeBeginPeriod")
+		if timeBeginPeriod != nil {
+			timeBeginPeriod.Call(uintptr(1))
+		}
+	}
+}
+
+var setupTickerResolutionOnce sync.Once
+
+func onProfilerStart() {
+	setupTickerResolutionOnce.Do(setTimeTickerResolution)
+}