refactor to mautrix 0.17.x; update deps

vendor/maunium.net/go/mautrix/crypto/goolm/libolmpickle/pickle.go

@@ -0,0 +1,41 @@
+package libolmpickle
+
+import (
+	"encoding/binary"
+)
+
+func PickleUInt8(value uint8, target []byte) int {
+	target[0] = value
+	return 1
+}
+func PickleUInt8Len(value uint8) int {
+	return 1
+}
+
+func PickleBool(value bool, target []byte) int {
+	if value {
+		target[0] = 0x01
+	} else {
+		target[0] = 0x00
+	}
+	return 1
+}
+func PickleBoolLen(value bool) int {
+	return 1
+}
+
+func PickleBytes(value, target []byte) int {
+	return copy(target, value)
+}
+func PickleBytesLen(value []byte) int {
+	return len(value)
+}
+
+func PickleUInt32(value uint32, target []byte) int {
+	res := make([]byte, 4) //4 bytes for int32
+	binary.BigEndian.PutUint32(res, value)
+	return copy(target, res)
+}
+func PickleUInt32Len(value uint32) int {
+	return 4
+}