message: Switch removed byte type to bytes1
  Breaking change in v0.8.0
diff: @@ -150,7 +150,7 @@ library Lib_RLPWriter {
  if (_len < 56) {
  encoded = new bytes(1);
  - encoded[0] = byte(uint8(_len) + uint8(_offset));
  + encoded[0] = bytes1(uint8(_len) + uint8(_offset));
  } else {
  uint256 lenLen;
  uint256 i = 1;
  @@ -160,9 +160,9 @@ library Lib_RLPWriter {
  }
  encoded = new bytes(lenLen + 1);
  - encoded[0] = byte(uint8(lenLen) + uint8(_offset) + 55);
  + encoded[0] = bytes1(uint8(lenLen) + uint8(_offset) + 55);
  for(i = 1; i <= lenLen; i++) {
  - encoded[i] = byte(uint8((_len / (256**(lenLen-i))) % 256));
  + encoded[i] = bytes1(uint8((_len / (256**(lenLen-i))) % 256));
  }
  }
  