BREAKING: update mautrix to 0.15.x

vendor/github.com/buger/jsonparser/bytes_safe.go

@@ -0,0 +1,25 @@
+// +build appengine appenginevm
+
+package jsonparser
+
+import (
+	"strconv"
+)
+
+// See fastbytes_unsafe.go for explanation on why *[]byte is used (signatures must be consistent with those in that file)
+
+func equalStr(b *[]byte, s string) bool {
+	return string(*b) == s
+}
+
+func parseFloat(b *[]byte) (float64, error) {
+	return strconv.ParseFloat(string(*b), 64)
+}
+
+func bytesToString(b *[]byte) string {
+	return string(*b)
+}
+
+func StringToBytes(s string) []byte {
+	return []byte(s)
+}