🐛 fix: allocate capacities in string encoding

Author: streamich

src/bencode/BencodeEncoder.ts

@@ -113,7 +113,7 @@ export class BencodeEncoder implements BinaryJsonEncoder {
     const length = utf8Size(str);
     writer.ascii(length + '');
     writer.u8(0x3a); // ':'
-    writer.ensureCapacity(length);
+    writer.ensureCapacity(str.length * 4);
     writer.utf8(str);
   }
 

src/ion/IonEncoderFast.ts

@@ -182,6 +182,7 @@ export class IonEncoderFast {
       writer.u8(TYPE_OVERLAY.STRI + 14);
       this.writeVUint(length);
     }
+    writer.ensureCapacity(length * 4);
     writer.utf8(str);
   }