增加websocket支持

vendor/github.com/bytedance/sonic/internal/rt/int48.go

@@ -17,12 +17,12 @@
 package rt
 
 const (
-    MinInt48 int64 = -(1 << 47)
-    MaxInt48 int64 = +(1 << 47) - 1
+    MinInt48 = -(1 << 47)
+    MaxInt48 = +(1 << 47) - 1
 )
 
 func PackInt(v int) uint64 {
-    if u := uint64(v); int64(v) < MinInt48 || int64(v) > MaxInt48 {
+    if u := uint64(v); v < MinInt48 || v > MaxInt48 {
         panic("int48 out of range")
     } else {
         return ((u >> 63) << 47) | (u & 0x00007fffffffffff)