Bump SBT version to 1.8.0

[64]

This fixes the following error:

$ sbt test
copying runtime jar...
[info] [launcher] getting org.scala-sbt sbt 1.4.7  (this may take some time)...
java.lang.UnsupportedOperationException: The Security Manager is deprecated and will be removed in a future release
    at java.base/java.lang.System.setSecurityManager(System.java:425)
    at sbt.TrapExit$.installManager(TrapExit.scala:54)
    at sbt.StandardMain$.runManaged(Main.scala:187)
    at sbt.xMain$.$anonfun$run$8(Main.scala:102)
    at scala.util.DynamicVariable.withValue(DynamicVariable.scala:62)
    at scala.Console$.withIn(Console.scala:230)
    at sbt.internal.util.Terminal$.withIn(Terminal.scala:560)
    at sbt.internal.util.Terminal$.$anonfun$withStreams$1(Terminal.scala:350)
    at scala.util.DynamicVariable.withValue(DynamicVariable.scala:62)
    at scala.Console$.withOut(Console.scala:167)
    at sbt.internal.util.Terminal$.$anonfun$withOut$2(Terminal.scala:550)
    at scala.util.DynamicVariable.withValue(DynamicVariable.scala:62)
    at scala.Console$.withErr(Console.scala:196)
    at sbt.internal.util.Terminal$.withOut(Terminal.scala:550)
    at sbt.internal.util.Terminal$.withStreams(Terminal.scala:350)
    at sbt.xMain$.run(Main.scala:86)
    at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
    at java.base/java.lang.reflect.Method.invoke(Method.java:578)
    at sbt.internal.XMainConfiguration.run(XMainConfiguration.scala:83)
    at sbt.xMain.run(Main.scala:46)
    at xsbt.boot.Launch$.$anonfun$run$1(Launch.scala:149)
    at xsbt.boot.Launch$.withContextLoader(Launch.scala:176)
    at xsbt.boot.Launch$.run(Launch.scala:149)
    at xsbt.boot.Launch$.$anonfun$apply$1(Launch.scala:44)
    at xsbt.boot.Launch$.launch(Launch.scala:159)
    at xsbt.boot.Launch$.apply(Launch.scala:44)
    at xsbt.boot.Launch$.apply(Launch.scala:21)
    at xsbt.boot.Boot$.runImpl(Boot.scala:78)
    at xsbt.boot.Boot$.run(Boot.scala:73)
    at xsbt.boot.Boot$.main(Boot.scala:21)
    at xsbt.boot.Boot.main(Boot.scala)
[error] [launcher] error during sbt launcher: java.lang.UnsupportedOperationException: The Security Manager is deprecated and will be removed in a future release

[Dolu1990]

Thanks :)