refactor to mautrix 0.17.x; update deps

vendor/go.mau.fi/util/exerrors/must.go

@@ -0,0 +1,23 @@
+// Copyright (c) 2024 Tulir Asokan
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package exerrors
+
+func Must[T any](val T, err error) T {
+	PanicIfNotNil(err)
+	return val
+}
+
+func Must2[T any, T2 any](val T, val2 T2, err error) (T, T2) {
+	PanicIfNotNil(err)
+	return val, val2
+}
+
+func PanicIfNotNil(err error) {
+	if err != nil {
+		panic(err)
+	}
+}