Fixes library and compilation warnings, defaults to Scala 2.13

[anskarl]

• updates Circe to 0.13.0 (only for Scala 2.12 and 2.12)
• downgrades typesafe config to 1.3.3, since this is the version that Akka HTTP uses
• excludes scala-library from dependencies
• upgrades Akka HTTP to 10.1.12
• for Scala 2.13 dsql uses StringContext.checkLengths and StringContext.processEscapes, since sc.checkLengths and StringContext.treatEscapes are deprecated.
• default Scala version is now 2.13

For Scala 2.12 and 2.13 there aren't any incompatibilities among library dependencies. For 2.11 there are minor info messages for scala-reflect and jawn-parser:

sbt:scruid> ++2.11.12 evicted
[info] Setting Scala version to 2.11.12 on 1 projects.
[info] Reapplying settings...
[info] Updating ...
[info] Done updating.
[info] Here are other dependency conflicts that were resolved:
[info]  * org.scala-lang:scala-reflect:2.11.12 is selected over 2.11.11
[info]      +- org.typelevel:machinist_2.11:0.6.6                 (depends on 2.11.12)
[info]      +- com.typesafe.scala-logging:scala-logging_2.11:3.9.2 (depends on 2.11.11)
[info]  * org.typelevel:jawn-parser_2.11:0.14.2 is selected over 0.14.1
[info]      +- org.mdedetrich:akka-stream-json_2.11:0.5.0         (depends on 0.14.2)
[info]      +- io.circe:circe-jawn_2.11:0.11.1 ()                 (depends on 0.14.1)
[success]

sbt:scruid> ++2.12.11 evicted
[info] Setting Scala version to 2.12.11 on 1 projects.
[info] Reapplying settings...
[info] Updating ...
[info] Done updating.
[success]

sbt:scruid> ++2.13.2 evicted
[info] Setting Scala version to 2.13.2 on 1 projects.
[info] Reapplying settings...
[info] Set current project to scruid (in build file:/Users/anskarl/work/Personal/dev/scruid/)
[info] Updating ...
[info] Done updating.
[success]

In Scala 2.13 Either is right-biased, therefore .right is deprecated:

[warn] src/main/scala/ing/wbaa/druid/client/DruidClient.scala:155:52: method right in class Either is deprecated (since 2.13.0): Either is now right-biased, use methods directly on Either
[warn]               decode[List[DruidScanResults]](json).right
[warn]                                                    ^
[warn] src/main/scala/ing/wbaa/druid/client/DruidClient.scala:158:40: method right in class Either is deprecated (since 2.13.0): Either is now right-biased, use methods directly on Either
[warn]               decode[List[Json]](json).right
[warn]                                        ^
[warn] src/main/scala/ing/wbaa/druid/client/DruidClient.scala:161:47: method right in class Either is deprecated (since 2.13.0): Either is now right-biased, use methods directly on Either
[warn]               decode[List[DruidResult]](json).right

To overcome this issue, I've added Scala-specific version of a helper function in ing.wbaa.druid.client.CirceDecoders that performs the desired map operation.

Specifically in Scala 2.11:

import io.circe.java8.time._

trait CirceDecoders extends JavaTimeDecoders {

  protected def mapRightProjection[L, R, R1](either: Either[L,R])(f: R => R1): Either[L,R1] = either match {
    case Right(value) => Right(f(value))
    case _ => either.asInstanceOf[Either[L, R1]]
  }

}

Similarly in Scala 2.12:

trait CirceDecoders {

  protected def mapRightProjection[L, R, R1](either: Either[L,R])(f: R => R1): Either[L,R1] = either match {
    case Right(value) => Right(f(value))
    case _ => either.asInstanceOf[Either[L, R1]]
  }

}

While in Scala 2.13 is simply:

trait CirceDecoders {

  protected def mapRightProjection[L, R, R1](either: Either[L,R])(f: R => R1): Either[L,R1] = either.map(f(_))

}

[anskarl]

ok I am not going to do any other update, it is ready for review :)

[mmartina]

everything looks fine to me