upgrade deps; rewrite smtp session

vendor/github.com/getsentry/sentry-go/internal/ratelimit/category.go

@@ -1,6 +1,11 @@
 package ratelimit
 
-import "strings"
+import (
+	"strings"
+
+	"golang.org/x/text/cases"
+	"golang.org/x/text/language"
+)
 
 // Reference:
 // https://github.com/getsentry/relay/blob/0424a2e017d193a93918053c90cdae9472d164bf/relay-common/src/constants.rs#L116-L127
@@ -31,11 +36,11 @@ func (c Category) String() string {
 	case "":
 		return "CategoryAll"
 	default:
-		var b strings.Builder
-		b.WriteString("Category")
+		caser := cases.Title(language.English)
+		rv := "Category"
 		for _, w := range strings.Fields(string(c)) {
-			b.WriteString(strings.Title(w))
+			rv += caser.String(w)
 		}
-		return b.String()
+		return rv
 	}
 }

vendor/github.com/getsentry/sentry-go/internal/ratelimit/rate_limits.go

@@ -15,7 +15,7 @@ var errInvalidXSRLRetryAfter = errors.New("invalid retry-after value")
 //
 // Example
 //
-//      X-Sentry-Rate-Limits: 60:transaction, 2700:default;error;security
+//	X-Sentry-Rate-Limits: 60:transaction, 2700:default;error;security
 //
 // This will rate limit transactions for the next 60 seconds and errors for the
 // next 2700 seconds.