title: ScalikeJDBC + SQlite: Cannot change read-only flag after establishing a connection
body: <p>Trying to get working ScalikeJDBC and SQLite. Have a simple code based on provided examples:</p>
  
  <pre><code>import scalikejdbc._, SQLInterpolation._
  
  object Test extends App {
    Class.forName("org.sqlite.JDBC")
    ConnectionPool.singleton("jdbc:sqlite:test.db", null, null)
  
    implicit val session = AutoSession
  
    println(sql"""SELECT * FROM kv WHERE key == 'seq' LIMIT 1""".map(identity).single().apply()))
  }
  </code></pre>
  
  <p>It fails with exception:</p>
  
  <pre><code>Exception in thread "main" java.sql.SQLException: Cannot change read-only flag after establishing a connection. Use SQLiteConfig#setReadOnly and QLiteConfig.createConnection().
  at org.sqlite.SQLiteConnection.setReadOnly(SQLiteConnection.java:447)
  at org.apache.commons.dbcp.DelegatingConnection.setReadOnly(DelegatingConnection.java:377)
  at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.setReadOnly(PoolingDataSource.java:338)
  at scalikejdbc.DBConnection$class.readOnlySession(DB.scala:138)
  at scalikejdbc.DB.readOnlySession(DB.scala:498)
  ...
  </code></pre>
  
  <p>I've tried both scalikejdbc 1.7 and 2.0, error remains. As sqlite driver I use <code>"org.xerial" % "sqlite-jdbc" % "3.7.+"</code>.</p>
  
  <p>What can I do to fix the error?</p>