Update dependency sbt/sbt to v0.13.18

[renovate]

This PR contains the following updates:

Package	Update	Change
sbt/sbt	patch	0.13.16 -> 0.13.18

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Release Notes

sbt/sbt (sbt/sbt)

v0.13.18: 0.13.18

Compare Source

• Backports sddPluginSbtFile command from #​4211 by @​jastice
• Backports base64 decoder fix https://github.com/sbt/zinc/pull/502 by @​jilen
• Backports Scala version update used by sbt plugin cross building ^^ #​3923 by @​xuwei-k

v0.13.17: 0.13.17

Compare Source

Improvements

• Updates Scala version to 2.10.7 for Java 9 support. #​3848 by @​eed3si9n

Bug fixes

• Backports logging and clean concurrency fix. #​2156/#​3834 by @​dwijnand
• Fixes over-compilation on Java 9 scala.ext.dir. #​3142/#​3701 by @​retronym
• Fixes addSbtPlugin to use the correct version of sbt. #​3393/#​3397 by @​dwijnand
• Changes the tuple enrichment deprecation warning messages. #​3455 by @​olafurpg
• Fixes addCompilerPlugin(...) so it can consume compiler plugins published to Ivy repository using sbt 1.x. #​3784/#​3855 by @​eed3si9n

Internal

• Fixes the source code to be doc friendly. #​3401 by @​dwijnand

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