chore: go mod vendor

vendor/github.com/gregdel/pushover/errors.go

@@ -0,0 +1,18 @@
+package pushover
+
+import (
+	"strings"
+)
+
+// Errors represents the errors returned by pushover.
+type Errors []string
+
+// Error represents the error as a string.
+func (e Errors) Error() string {
+	ret := ""
+	if len(e) > 0 {
+		ret = "Errors:\n"
+		ret += strings.Join(e, "\n")
+	}
+	return ret
+}