dart - Dart - SqlJocky - クラス 'SHA1' を解決できません

Question

次のコードを使用して、Amazon RDS で MySQL サーバーに接続しようとしています。

 var pool = new ConnectionPool(
      host: "xxxx.rds.amazonaws.com",
      port: 3306,
      user: "root",
      password: "123456",
      db: "crm",
      max: 5);
  try {
    var results = await pool.query("show tables;");
    results.forEach((row) {
      print(row);
    });
  } catch (exception) {
    print(exception);
  }

私はこれに遭遇しました：

2017-07-13 19:14:11.556440: ConnectionPool: Running query: show tables;
2017-07-13 19:14:11.562390: ConnectionPool: Getting a connection
2017-07-13 19:14:11.562800: ConnectionPool: Number of in-use connections: 0
2017-07-13 19:14:11.563133: ConnectionPool: Creating new pooled cnx#0
2017-07-13 19:14:11.565475: Connection.Lifecycle: Use connection #0
2017-07-13 19:14:11.566736: Connection: opening connection to xxxx.rds.amazonaws.com:3306/portea_crm
2017-07-13 19:14:11.653693: BufferedSocket: WRITE data
2017-07-13 19:14:11.689824: BufferedSocket: READ data
2017-07-13 19:14:11.689943: BufferedSocket: READ data: no buffer
2017-07-13 19:14:11.690250: Connection: readPacket readyForHeader=true
2017-07-13 19:14:11.690613: BufferedSocket: readBuffer, length=4
2017-07-13 19:14:11.690815: BufferedSocket: readBuffer, data already ready
2017-07-13 19:14:11.693935: BufferedSocket: read 4 bytes
2017-07-13 19:14:11.694517: Connection: about to read 78 bytes for packet 0
2017-07-13 19:14:11.694662: Connection: buffer size=78
2017-07-13 19:14:11.694714: BufferedSocket: readBuffer, length=78
2017-07-13 19:14:11.694755: BufferedSocket: readBuffer, data already ready
2017-07-13 19:14:11.694969: BufferedSocket: read 78 bytes
2017-07-13 19:14:11.702610: Connection: completing with exception: 'package:sqljocky/src/auth/auth_handler.dart': malformed type: line 24 pos 24: cannot resolve class 'SHA1' from '_AuthHandler@16306938'
      var hasher = new SHA1();
                       ^

ライブラリで SHA1 を呼び出す crypto lib 依存関係とは関係ありますか?

また、私の SQLjocky のバージョンは 0.6.1 です。私は0.14.1であるパブサイトで見ました。更新できないのはなぜですか?