Update sbt to 1.4.7

[scala-steward]

Updates org.scala-sbt:sbt from 1.3.13 to 1.4.7.

I'll automatically update this PR to resolve conflicts as long as you don't change it yourself.

If you'd like to skip this version, you can just close this PR. If you have any feedback, just mention me in the comments below.

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Have a fantastic day writing Scala!

Ignore future updates

Add this to your .scala-steward.conf file to ignore future updates of this dependency:

updates.ignore = [ { groupId = "org.scala-sbt", artifactId = "sbt" } ]

labels: library-update, semver-minor

[gvolpe]

[error] (run-main-0) java.lang.VerifyError: class scala.tools.nsc.Global overrides final method phaseWithId.()[Lscala/reflect/internal/Phase;
[error] java.lang.VerifyError: class scala.tools.nsc.Global overrides final method phaseWithId.()[Lscala/reflect/internal/Phase;
[error] 	at java.lang.ClassLoader.defineClass1(Native Method)
[error] 	at java.lang.ClassLoader.defineClass(ClassLoader.java:756)
[error] 	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)

[scala-steward]

Superseded by #181.